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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/194428">194428</a></dd>
<dt>Author</dt> <dd>aestes@apple.com</dd>
<dt>Date</dt> <dd>2015-12-28 08:26:24 -0800 (Mon, 28 Dec 2015)</dd>
</dl>

<h3>Log Message</h3>
<pre>Stop moving local objects in return statements
https://bugs.webkit.org/show_bug.cgi?id=152557

Reviewed by Brady Eidson.

Source/JavaScriptCore:

Calling std::move() on a local object in a return statement prevents the compiler from applying the return value optimization.

Clang can warn about these mistakes with -Wpessimizing-move, although only when std::move() is called directly.
I found these issues by temporarily replacing WTF::move with std::move and recompiling.

* inspector/ScriptCallStack.cpp:
(Inspector::ScriptCallStack::buildInspectorArray):
* inspector/agents/InspectorScriptProfilerAgent.cpp:
(Inspector::buildInspectorObject):
* jit/CallFrameShuffler.h:
(JSC::CallFrameShuffler::snapshot):
* runtime/TypeSet.cpp:
(JSC::TypeSet::allStructureRepresentations):
(JSC::StructureShape::inspectorRepresentation):

Source/WebCore:

Calling std::move() on a local object in a return statement prevents the compiler from applying the return value optimization.

Clang can warn about these mistakes with -Wpessimizing-move, although only when std::move() is called directly.
I found these issues by temporarily replacing WTF::move with std::move and recompiling.

* Modules/indexeddb/IDBDatabaseIdentifier.cpp:
(WebCore::IDBDatabaseIdentifier::isolatedCopy):
* Modules/indexeddb/IDBKeyData.cpp:
(WebCore::IDBKeyData::deletedValue):
* Modules/indexeddb/client/IDBDatabaseImpl.cpp:
(WebCore::IDBClient::IDBDatabase::objectStoreNames):
(WebCore::IDBClient::IDBDatabase::startVersionChangeTransaction):
* Modules/indexeddb/client/IDBTransactionImpl.cpp:
(WebCore::IDBClient::IDBTransaction::createObjectStore):
(WebCore::IDBClient::IDBTransaction::createIndex):
(WebCore::IDBClient::IDBTransaction::doRequestOpenCursor):
(WebCore::IDBClient::IDBTransaction::requestGetRecord):
(WebCore::IDBClient::IDBTransaction::requestIndexRecord):
(WebCore::IDBClient::IDBTransaction::requestClearObjectStore):
(WebCore::IDBClient::IDBTransaction::requestPutOrAdd):
* Modules/indexeddb/server/UniqueIDBDatabase.cpp:
(WebCore::IDBServer::UniqueIDBDatabase::takeNextRunnableTransaction):
* Modules/indexeddb/shared/IDBDatabaseInfo.cpp:
(WebCore::IDBDatabaseInfo::isolatedCopy):
(WebCore::IDBDatabaseInfo::objectStoreNames):
* Modules/indexeddb/shared/IDBResultData.cpp:
(WebCore::IDBResultData::error):
(WebCore::IDBResultData::openDatabaseSuccess):
(WebCore::IDBResultData::openDatabaseUpgradeNeeded):
* Modules/indexeddb/shared/IDBTransactionInfo.cpp:
(WebCore::IDBTransactionInfo::versionChange):
(WebCore::IDBTransactionInfo::isolatedCopy):
* Modules/indexeddb/shared/InProcessIDBServer.cpp:
(WebCore::InProcessIDBServer::create):
* Modules/webaudio/OfflineAudioContext.cpp:
(WebCore::OfflineAudioContext::create):
* Modules/webdatabase/DatabaseTracker.cpp:
(WebCore::DatabaseTracker::originLockFor):
* Modules/websockets/WebSocket.cpp:
(WebCore::WebSocket::create):
* css/CSSPrimitiveValue.cpp:
(WebCore::CSSPrimitiveValue::formatNumberValue):
* dom/NodeOrString.cpp:
(WebCore::convertNodesOrStringsIntoNode):
* inspector/InspectorApplicationCacheAgent.cpp:
(WebCore::InspectorApplicationCacheAgent::buildArrayForApplicationCacheResources):
* inspector/InspectorDOMAgent.cpp:
(WebCore::InspectorDOMAgent::buildObjectForNode):
(WebCore::InspectorDOMAgent::buildArrayForElementAttributes):
(WebCore::InspectorDOMAgent::buildArrayForContainerChildren):
(WebCore::InspectorDOMAgent::buildObjectForEventListener):
* inspector/InspectorIndexedDBAgent.cpp:
* inspector/InspectorLayerTreeAgent.cpp:
(WebCore::InspectorLayerTreeAgent::buildObjectForLayer):
* inspector/InspectorNetworkAgent.cpp:
(WebCore::buildObjectForHeaders):
(WebCore::buildObjectForResourceRequest):
(WebCore::buildObjectForCachedResource):
* inspector/InspectorOverlay.cpp:
(WebCore::buildArrayForQuad):
(WebCore::buildObjectForFlowRegions):
(WebCore::InspectorOverlay::buildObjectForHighlightedNodes):
* inspector/InspectorPageAgent.cpp:
(WebCore::createXHRTextDecoder):
(WebCore::buildArrayForCookies):
(WebCore::InspectorPageAgent::buildObjectForFrame):
* inspector/InspectorStyleSheet.cpp:
(WebCore::buildMediaObject):
(WebCore::InspectorStyle::buildArrayForComputedStyle):
(WebCore::buildObjectForSelectorHelper):
(WebCore::selectorsFromSource):
(WebCore::InspectorStyleSheet::buildObjectForSelectorList):
(WebCore::InspectorStyleSheet::buildObjectForStyle):
(WebCore::InspectorStyleSheet::buildArrayForRuleList):
* inspector/InspectorTimelineAgent.cpp:
(WebCore::InspectorTimelineAgent::stopFromConsole):
* inspector/TimelineRecordFactory.cpp:
(WebCore::TimelineRecordFactory::createGenericRecord):
(WebCore::TimelineRecordFactory::createFunctionCallData):
(WebCore::TimelineRecordFactory::createConsoleProfileData):
(WebCore::TimelineRecordFactory::createProbeSampleData):
(WebCore::TimelineRecordFactory::createEventDispatchData):
(WebCore::TimelineRecordFactory::createGenericTimerData):
(WebCore::TimelineRecordFactory::createTimerInstallData):
(WebCore::TimelineRecordFactory::createEvaluateScriptData):
(WebCore::TimelineRecordFactory::createTimeStampData):
(WebCore::TimelineRecordFactory::createAnimationFrameData):
(WebCore::createQuad):
(WebCore::TimelineRecordFactory::createPaintData):
(WebCore::buildInspectorObject):
* loader/FrameLoader.cpp:
(WebCore::createWindow):
* loader/NavigationAction.cpp:
(WebCore::NavigationAction::copyWithShouldOpenExternalURLsPolicy):
* page/DOMWindow.cpp:
(WebCore::DOMWindow::createWindow):
* platform/network/ios/QuickLook.mm:
(WebCore::QuickLookHandle::create):
* testing/Internals.cpp:
(WebCore::Internals::openDummyInspectorFrontend):
* workers/WorkerScriptLoader.cpp:
(WebCore::WorkerScriptLoader::createResourceRequest):
* xml/XPathExpression.cpp:
(WebCore::XPathExpression::evaluate):

Source/WebKit2:

Calling std::move() on a local object in a return statement prevents the compiler from applying the return value optimization.

Clang can warn about these mistakes with -Wpessimizing-move, although only when std::move() is called directly.
I found these issues by temporarily replacing WTF::move with std::move and recompiling.

* UIProcess/WebPageProxy.cpp:
(WebKit::ExceededDatabaseQuotaRecords::createRecord):

Source/WTF:

* wtf/StdLibExtras.h: Added a FIXME about how using WTF::move() prevents several Clang diagnostics from emitting useful warnings.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCoreinspectorScriptCallStackcpp">trunk/Source/JavaScriptCore/inspector/ScriptCallStack.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreinspectoragentsInspectorScriptProfilerAgentcpp">trunk/Source/JavaScriptCore/inspector/agents/InspectorScriptProfilerAgent.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCorejitCallFrameShufflerh">trunk/Source/JavaScriptCore/jit/CallFrameShuffler.h</a></li>
<li><a href="#trunkSourceJavaScriptCoreruntimeTypeSetcpp">trunk/Source/JavaScriptCore/runtime/TypeSet.cpp</a></li>
<li><a href="#trunkSourceWTFChangeLog">trunk/Source/WTF/ChangeLog</a></li>
<li><a href="#trunkSourceWTFwtfStdLibExtrash">trunk/Source/WTF/wtf/StdLibExtras.h</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreModulesindexeddbIDBDatabaseIdentifiercpp">trunk/Source/WebCore/Modules/indexeddb/IDBDatabaseIdentifier.cpp</a></li>
<li><a href="#trunkSourceWebCoreModulesindexeddbIDBKeyDatacpp">trunk/Source/WebCore/Modules/indexeddb/IDBKeyData.cpp</a></li>
<li><a href="#trunkSourceWebCoreModulesindexeddbclientIDBDatabaseImplcpp">trunk/Source/WebCore/Modules/indexeddb/client/IDBDatabaseImpl.cpp</a></li>
<li><a href="#trunkSourceWebCoreModulesindexeddbclientIDBTransactionImplcpp">trunk/Source/WebCore/Modules/indexeddb/client/IDBTransactionImpl.cpp</a></li>
<li><a href="#trunkSourceWebCoreModulesindexeddbserverUniqueIDBDatabasecpp">trunk/Source/WebCore/Modules/indexeddb/server/UniqueIDBDatabase.cpp</a></li>
<li><a href="#trunkSourceWebCoreModulesindexeddbsharedIDBDatabaseInfocpp">trunk/Source/WebCore/Modules/indexeddb/shared/IDBDatabaseInfo.cpp</a></li>
<li><a href="#trunkSourceWebCoreModulesindexeddbsharedIDBResultDatacpp">trunk/Source/WebCore/Modules/indexeddb/shared/IDBResultData.cpp</a></li>
<li><a href="#trunkSourceWebCoreModulesindexeddbsharedIDBTransactionInfocpp">trunk/Source/WebCore/Modules/indexeddb/shared/IDBTransactionInfo.cpp</a></li>
<li><a href="#trunkSourceWebCoreModulesindexeddbsharedInProcessIDBServercpp">trunk/Source/WebCore/Modules/indexeddb/shared/InProcessIDBServer.cpp</a></li>
<li><a href="#trunkSourceWebCoreModuleswebaudioOfflineAudioContextcpp">trunk/Source/WebCore/Modules/webaudio/OfflineAudioContext.cpp</a></li>
<li><a href="#trunkSourceWebCoreModuleswebdatabaseDatabaseTrackercpp">trunk/Source/WebCore/Modules/webdatabase/DatabaseTracker.cpp</a></li>
<li><a href="#trunkSourceWebCoreModuleswebsocketsWebSocketcpp">trunk/Source/WebCore/Modules/websockets/WebSocket.cpp</a></li>
<li><a href="#trunkSourceWebCorecssCSSPrimitiveValuecpp">trunk/Source/WebCore/css/CSSPrimitiveValue.cpp</a></li>
<li><a href="#trunkSourceWebCoredomNodeOrStringcpp">trunk/Source/WebCore/dom/NodeOrString.cpp</a></li>
<li><a href="#trunkSourceWebCoreinspectorInspectorApplicationCacheAgentcpp">trunk/Source/WebCore/inspector/InspectorApplicationCacheAgent.cpp</a></li>
<li><a href="#trunkSourceWebCoreinspectorInspectorDOMAgentcpp">trunk/Source/WebCore/inspector/InspectorDOMAgent.cpp</a></li>
<li><a href="#trunkSourceWebCoreinspectorInspectorIndexedDBAgentcpp">trunk/Source/WebCore/inspector/InspectorIndexedDBAgent.cpp</a></li>
<li><a href="#trunkSourceWebCoreinspectorInspectorLayerTreeAgentcpp">trunk/Source/WebCore/inspector/InspectorLayerTreeAgent.cpp</a></li>
<li><a href="#trunkSourceWebCoreinspectorInspectorNetworkAgentcpp">trunk/Source/WebCore/inspector/InspectorNetworkAgent.cpp</a></li>
<li><a href="#trunkSourceWebCoreinspectorInspectorOverlaycpp">trunk/Source/WebCore/inspector/InspectorOverlay.cpp</a></li>
<li><a href="#trunkSourceWebCoreinspectorInspectorPageAgentcpp">trunk/Source/WebCore/inspector/InspectorPageAgent.cpp</a></li>
<li><a href="#trunkSourceWebCoreinspectorInspectorStyleSheetcpp">trunk/Source/WebCore/inspector/InspectorStyleSheet.cpp</a></li>
<li><a href="#trunkSourceWebCoreinspectorInspectorTimelineAgentcpp">trunk/Source/WebCore/inspector/InspectorTimelineAgent.cpp</a></li>
<li><a href="#trunkSourceWebCoreinspectorTimelineRecordFactorycpp">trunk/Source/WebCore/inspector/TimelineRecordFactory.cpp</a></li>
<li><a href="#trunkSourceWebCoreloaderFrameLoadercpp">trunk/Source/WebCore/loader/FrameLoader.cpp</a></li>
<li><a href="#trunkSourceWebCoreloaderNavigationActioncpp">trunk/Source/WebCore/loader/NavigationAction.cpp</a></li>
<li><a href="#trunkSourceWebCorepageDOMWindowcpp">trunk/Source/WebCore/page/DOMWindow.cpp</a></li>
<li><a href="#trunkSourceWebCoreplatformnetworkiosQuickLookmm">trunk/Source/WebCore/platform/network/ios/QuickLook.mm</a></li>
<li><a href="#trunkSourceWebCoretestingInternalscpp">trunk/Source/WebCore/testing/Internals.cpp</a></li>
<li><a href="#trunkSourceWebCoreworkersWorkerScriptLoadercpp">trunk/Source/WebCore/workers/WorkerScriptLoader.cpp</a></li>
<li><a href="#trunkSourceWebCorexmlXPathExpressioncpp">trunk/Source/WebCore/xml/XPathExpression.cpp</a></li>
<li><a href="#trunkSourceWebKit2ChangeLog">trunk/Source/WebKit2/ChangeLog</a></li>
<li><a href="#trunkSourceWebKit2UIProcessWebPageProxycpp">trunk/Source/WebKit2/UIProcess/WebPageProxy.cpp</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/JavaScriptCore/ChangeLog        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -1,3 +1,25 @@
</span><ins>+2015-12-25  Andy Estes  &lt;aestes@apple.com&gt;
+
+        Stop moving local objects in return statements
+        https://bugs.webkit.org/show_bug.cgi?id=152557
+
+        Reviewed by Brady Eidson.
+
+        Calling std::move() on a local object in a return statement prevents the compiler from applying the return value optimization.
+
+        Clang can warn about these mistakes with -Wpessimizing-move, although only when std::move() is called directly.
+        I found these issues by temporarily replacing WTF::move with std::move and recompiling.
+
+        * inspector/ScriptCallStack.cpp:
+        (Inspector::ScriptCallStack::buildInspectorArray):
+        * inspector/agents/InspectorScriptProfilerAgent.cpp:
+        (Inspector::buildInspectorObject):
+        * jit/CallFrameShuffler.h:
+        (JSC::CallFrameShuffler::snapshot):
+        * runtime/TypeSet.cpp:
+        (JSC::TypeSet::allStructureRepresentations):
+        (JSC::StructureShape::inspectorRepresentation):
+
</ins><span class="cx"> 2015-12-26  Mark Lam  &lt;mark.lam@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Rename NodeMayOverflowInXXX to NodeMayOverflowInt32InXXX.
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreinspectorScriptCallStackcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/inspector/ScriptCallStack.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/inspector/ScriptCallStack.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/JavaScriptCore/inspector/ScriptCallStack.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -111,7 +111,7 @@
</span><span class="cx">     auto frames = Inspector::Protocol::Console::StackTrace::create();
</span><span class="cx">     for (size_t i = 0; i &lt; m_frames.size(); i++)
</span><span class="cx">         frames-&gt;addItem(m_frames.at(i).buildInspectorObject());
</span><del>-    return WTF::move(frames);
</del><ins>+    return frames;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> } // namespace Inspector
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreinspectoragentsInspectorScriptProfilerAgentcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/inspector/agents/InspectorScriptProfilerAgent.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/inspector/agents/InspectorScriptProfilerAgent.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/JavaScriptCore/inspector/agents/InspectorScriptProfilerAgent.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -181,7 +181,7 @@
</span><span class="cx">         result-&gt;setChildren(WTF::move(children));
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    return WTF::move(result);
</del><ins>+    return result;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> static Ref&lt;Protocol::Timeline::CPUProfile&gt; buildProfileInspectorObject(const JSC::Profile* profile)
</span></span></pre></div>
<a id="trunkSourceJavaScriptCorejitCallFrameShufflerh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/jit/CallFrameShuffler.h (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/jit/CallFrameShuffler.h        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/JavaScriptCore/jit/CallFrameShuffler.h        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -117,7 +117,7 @@
</span><span class="cx">             RELEASE_ASSERT_NOT_REACHED();
</span><span class="cx"> #endif
</span><span class="cx">         }
</span><del>-        return WTF::move(data);
</del><ins>+        return data;
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     // Ask the shuffler to put the callee into some registers once the
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreruntimeTypeSetcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/runtime/TypeSet.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/runtime/TypeSet.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/JavaScriptCore/runtime/TypeSet.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -224,7 +224,7 @@
</span><span class="cx">     for (size_t i = 0; i &lt; m_structureHistory.size(); i++)
</span><span class="cx">         description-&gt;addItem(m_structureHistory.at(i)-&gt;inspectorRepresentation());
</span><span class="cx"> 
</span><del>-    return WTF::move(description);
</del><ins>+    return description;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;Inspector::Protocol::Runtime::TypeSet&gt; TypeSet::inspectorTypeSet() const
</span><span class="lines">@@ -523,7 +523,7 @@
</span><span class="cx">         currentShape = currentShape-&gt;m_proto;
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    return WTF::move(base);
</del><ins>+    return base;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> bool StructureShape::hasSamePrototypeChain(PassRefPtr&lt;StructureShape&gt; prpOther)
</span></span></pre></div>
<a id="trunkSourceWTFChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WTF/ChangeLog (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/ChangeLog        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WTF/ChangeLog        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -1,3 +1,12 @@
</span><ins>+2015-12-25  Andy Estes  &lt;aestes@apple.com&gt;
+
+        Stop moving local objects in return statements
+        https://bugs.webkit.org/show_bug.cgi?id=152557
+
+        Reviewed by Brady Eidson.
+
+        * wtf/StdLibExtras.h: Added a FIXME about how using WTF::move() prevents several Clang diagnostics from emitting useful warnings.
+
</ins><span class="cx"> 2015-12-22  Filip Pizlo  &lt;fpizlo@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         FTL B3 should be able to run richards
</span></span></pre></div>
<a id="trunkSourceWTFwtfStdLibExtrash"></a>
<div class="modfile"><h4>Modified: trunk/Source/WTF/wtf/StdLibExtras.h (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/wtf/StdLibExtras.h        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WTF/wtf/StdLibExtras.h        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -111,6 +111,8 @@
</span><span class="cx"> 
</span><span class="cx"> namespace WTF {
</span><span class="cx"> 
</span><ins>+// FIXME: Using this function prevents Clang's move diagnostics (-Wpessimizing-move, -Wredundant-move, -Wself-move) from
+// finding mistakes, since these diagnostics only evaluate calls to std::move().
</ins><span class="cx"> template&lt;typename T&gt;
</span><span class="cx"> ALWAYS_INLINE typename std::remove_reference&lt;T&gt;::type&amp;&amp; move(T&amp;&amp; value)
</span><span class="cx"> {
</span></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/ChangeLog        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -1,3 +1,115 @@
</span><ins>+2015-12-25  Andy Estes  &lt;aestes@apple.com&gt;
+
+        Stop moving local objects in return statements
+        https://bugs.webkit.org/show_bug.cgi?id=152557
+
+        Reviewed by Brady Eidson.
+
+        Calling std::move() on a local object in a return statement prevents the compiler from applying the return value optimization.
+
+        Clang can warn about these mistakes with -Wpessimizing-move, although only when std::move() is called directly.
+        I found these issues by temporarily replacing WTF::move with std::move and recompiling.
+
+        * Modules/indexeddb/IDBDatabaseIdentifier.cpp:
+        (WebCore::IDBDatabaseIdentifier::isolatedCopy):
+        * Modules/indexeddb/IDBKeyData.cpp:
+        (WebCore::IDBKeyData::deletedValue):
+        * Modules/indexeddb/client/IDBDatabaseImpl.cpp:
+        (WebCore::IDBClient::IDBDatabase::objectStoreNames):
+        (WebCore::IDBClient::IDBDatabase::startVersionChangeTransaction):
+        * Modules/indexeddb/client/IDBTransactionImpl.cpp:
+        (WebCore::IDBClient::IDBTransaction::createObjectStore):
+        (WebCore::IDBClient::IDBTransaction::createIndex):
+        (WebCore::IDBClient::IDBTransaction::doRequestOpenCursor):
+        (WebCore::IDBClient::IDBTransaction::requestGetRecord):
+        (WebCore::IDBClient::IDBTransaction::requestIndexRecord):
+        (WebCore::IDBClient::IDBTransaction::requestClearObjectStore):
+        (WebCore::IDBClient::IDBTransaction::requestPutOrAdd):
+        * Modules/indexeddb/server/UniqueIDBDatabase.cpp:
+        (WebCore::IDBServer::UniqueIDBDatabase::takeNextRunnableTransaction):
+        * Modules/indexeddb/shared/IDBDatabaseInfo.cpp:
+        (WebCore::IDBDatabaseInfo::isolatedCopy):
+        (WebCore::IDBDatabaseInfo::objectStoreNames):
+        * Modules/indexeddb/shared/IDBResultData.cpp:
+        (WebCore::IDBResultData::error):
+        (WebCore::IDBResultData::openDatabaseSuccess):
+        (WebCore::IDBResultData::openDatabaseUpgradeNeeded):
+        * Modules/indexeddb/shared/IDBTransactionInfo.cpp:
+        (WebCore::IDBTransactionInfo::versionChange):
+        (WebCore::IDBTransactionInfo::isolatedCopy):
+        * Modules/indexeddb/shared/InProcessIDBServer.cpp:
+        (WebCore::InProcessIDBServer::create):
+        * Modules/webaudio/OfflineAudioContext.cpp:
+        (WebCore::OfflineAudioContext::create):
+        * Modules/webdatabase/DatabaseTracker.cpp:
+        (WebCore::DatabaseTracker::originLockFor):
+        * Modules/websockets/WebSocket.cpp:
+        (WebCore::WebSocket::create):
+        * css/CSSPrimitiveValue.cpp:
+        (WebCore::CSSPrimitiveValue::formatNumberValue):
+        * dom/NodeOrString.cpp:
+        (WebCore::convertNodesOrStringsIntoNode):
+        * inspector/InspectorApplicationCacheAgent.cpp:
+        (WebCore::InspectorApplicationCacheAgent::buildArrayForApplicationCacheResources):
+        * inspector/InspectorDOMAgent.cpp:
+        (WebCore::InspectorDOMAgent::buildObjectForNode):
+        (WebCore::InspectorDOMAgent::buildArrayForElementAttributes):
+        (WebCore::InspectorDOMAgent::buildArrayForContainerChildren):
+        (WebCore::InspectorDOMAgent::buildObjectForEventListener):
+        * inspector/InspectorIndexedDBAgent.cpp:
+        * inspector/InspectorLayerTreeAgent.cpp:
+        (WebCore::InspectorLayerTreeAgent::buildObjectForLayer):
+        * inspector/InspectorNetworkAgent.cpp:
+        (WebCore::buildObjectForHeaders):
+        (WebCore::buildObjectForResourceRequest):
+        (WebCore::buildObjectForCachedResource):
+        * inspector/InspectorOverlay.cpp:
+        (WebCore::buildArrayForQuad):
+        (WebCore::buildObjectForFlowRegions):
+        (WebCore::InspectorOverlay::buildObjectForHighlightedNodes):
+        * inspector/InspectorPageAgent.cpp:
+        (WebCore::createXHRTextDecoder):
+        (WebCore::buildArrayForCookies):
+        (WebCore::InspectorPageAgent::buildObjectForFrame):
+        * inspector/InspectorStyleSheet.cpp:
+        (WebCore::buildMediaObject):
+        (WebCore::InspectorStyle::buildArrayForComputedStyle):
+        (WebCore::buildObjectForSelectorHelper):
+        (WebCore::selectorsFromSource):
+        (WebCore::InspectorStyleSheet::buildObjectForSelectorList):
+        (WebCore::InspectorStyleSheet::buildObjectForStyle):
+        (WebCore::InspectorStyleSheet::buildArrayForRuleList):
+        * inspector/InspectorTimelineAgent.cpp:
+        (WebCore::InspectorTimelineAgent::stopFromConsole):
+        * inspector/TimelineRecordFactory.cpp:
+        (WebCore::TimelineRecordFactory::createGenericRecord):
+        (WebCore::TimelineRecordFactory::createFunctionCallData):
+        (WebCore::TimelineRecordFactory::createConsoleProfileData):
+        (WebCore::TimelineRecordFactory::createProbeSampleData):
+        (WebCore::TimelineRecordFactory::createEventDispatchData):
+        (WebCore::TimelineRecordFactory::createGenericTimerData):
+        (WebCore::TimelineRecordFactory::createTimerInstallData):
+        (WebCore::TimelineRecordFactory::createEvaluateScriptData):
+        (WebCore::TimelineRecordFactory::createTimeStampData):
+        (WebCore::TimelineRecordFactory::createAnimationFrameData):
+        (WebCore::createQuad):
+        (WebCore::TimelineRecordFactory::createPaintData):
+        (WebCore::buildInspectorObject):
+        * loader/FrameLoader.cpp:
+        (WebCore::createWindow):
+        * loader/NavigationAction.cpp:
+        (WebCore::NavigationAction::copyWithShouldOpenExternalURLsPolicy):
+        * page/DOMWindow.cpp:
+        (WebCore::DOMWindow::createWindow):
+        * platform/network/ios/QuickLook.mm:
+        (WebCore::QuickLookHandle::create):
+        * testing/Internals.cpp:
+        (WebCore::Internals::openDummyInspectorFrontend):
+        * workers/WorkerScriptLoader.cpp:
+        (WebCore::WorkerScriptLoader::createResourceRequest):
+        * xml/XPathExpression.cpp:
+        (WebCore::XPathExpression::evaluate):
+
</ins><span class="cx"> 2015-12-27  Zalan Bujtas  &lt;zalan@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Should never be reached failure in WebCore::RenderElement::clearLayoutRootIfNeeded
</span></span></pre></div>
<a id="trunkSourceWebCoreModulesindexeddbIDBDatabaseIdentifiercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/indexeddb/IDBDatabaseIdentifier.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/indexeddb/IDBDatabaseIdentifier.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/Modules/indexeddb/IDBDatabaseIdentifier.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -52,7 +52,7 @@
</span><span class="cx">     identifier.m_openingOrigin = m_openingOrigin.isolatedCopy();
</span><span class="cx">     identifier.m_mainFrameOrigin = m_mainFrameOrigin.isolatedCopy();
</span><span class="cx"> 
</span><del>-    return WTF::move(identifier);
</del><ins>+    return identifier;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> #ifndef NDEBUG
</span></span></pre></div>
<a id="trunkSourceWebCoreModulesindexeddbIDBKeyDatacpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/indexeddb/IDBKeyData.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/indexeddb/IDBKeyData.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/Modules/indexeddb/IDBKeyData.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -324,7 +324,7 @@
</span><span class="cx">     IDBKeyData result;
</span><span class="cx">     result.m_isNull = false;
</span><span class="cx">     result.m_isDeletedValue = true;
</span><del>-    return WTF::move(result);
</del><ins>+    return result;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> bool IDBKeyData::operator&lt;(const IDBKeyData&amp; rhs) const
</span></span></pre></div>
<a id="trunkSourceWebCoreModulesindexeddbclientIDBDatabaseImplcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/indexeddb/client/IDBDatabaseImpl.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/indexeddb/client/IDBDatabaseImpl.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/Modules/indexeddb/client/IDBDatabaseImpl.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -84,7 +84,7 @@
</span><span class="cx">     for (auto&amp; name : m_info.objectStoreNames())
</span><span class="cx">         objectStoreNames-&gt;append(name);
</span><span class="cx">     objectStoreNames-&gt;sort();
</span><del>-    return WTF::move(objectStoreNames);
</del><ins>+    return objectStoreNames;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> RefPtr&lt;WebCore::IDBObjectStore&gt; IDBDatabase::createObjectStore(const String&amp;, const Dictionary&amp;, ExceptionCodeWithMessage&amp;)
</span><span class="lines">@@ -266,7 +266,7 @@
</span><span class="cx"> 
</span><span class="cx">     m_activeTransactions.set(transaction-&gt;info().identifier(), &amp;transaction.get());
</span><span class="cx"> 
</span><del>-    return WTF::move(transaction);
</del><ins>+    return transaction;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void IDBDatabase::didStartTransaction(IDBTransaction&amp; transaction)
</span></span></pre></div>
<a id="trunkSourceWebCoreModulesindexeddbclientIDBTransactionImplcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/indexeddb/client/IDBTransactionImpl.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/indexeddb/client/IDBTransactionImpl.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/Modules/indexeddb/client/IDBTransactionImpl.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -444,7 +444,7 @@
</span><span class="cx">     auto operation = createTransactionOperation(*this, &amp;IDBTransaction::didCreateObjectStoreOnServer, &amp;IDBTransaction::createObjectStoreOnServer, info);
</span><span class="cx">     scheduleOperation(WTF::move(operation));
</span><span class="cx"> 
</span><del>-    return WTF::move(objectStore);
</del><ins>+    return objectStore;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void IDBTransaction::createObjectStoreOnServer(TransactionOperation&amp; operation, const IDBObjectStoreInfo&amp; info)
</span><span class="lines">@@ -473,7 +473,7 @@
</span><span class="cx">     auto operation = createTransactionOperation(*this, &amp;IDBTransaction::didCreateIndexOnServer, &amp;IDBTransaction::createIndexOnServer, info);
</span><span class="cx">     scheduleOperation(WTF::move(operation));
</span><span class="cx"> 
</span><del>-    return WTF::move(index);
</del><ins>+    return index;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void IDBTransaction::createIndexOnServer(TransactionOperation&amp; operation, const IDBIndexInfo&amp; info)
</span><span class="lines">@@ -529,7 +529,7 @@
</span><span class="cx">     auto operation = createTransactionOperation(*this, request.get(), &amp;IDBTransaction::didOpenCursorOnServer, &amp;IDBTransaction::openCursorOnServer, cursor-&gt;info());
</span><span class="cx">     scheduleOperation(WTF::move(operation));
</span><span class="cx"> 
</span><del>-    return WTF::move(request);
</del><ins>+    return request;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void IDBTransaction::openCursorOnServer(TransactionOperation&amp; operation, const IDBCursorInfo&amp; info)
</span><span class="lines">@@ -584,7 +584,7 @@
</span><span class="cx">     auto operation = createTransactionOperation(*this, request.get(), &amp;IDBTransaction::didGetRecordOnServer, &amp;IDBTransaction::getRecordOnServer, keyRangeData);
</span><span class="cx">     scheduleOperation(WTF::move(operation));
</span><span class="cx"> 
</span><del>-    return WTF::move(request);
</del><ins>+    return request;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;IDBRequest&gt; IDBTransaction::requestGetValue(ScriptExecutionContext&amp; context, IDBIndex&amp; index, const IDBKeyRangeData&amp; range)
</span><span class="lines">@@ -611,7 +611,7 @@
</span><span class="cx">     auto operation = createTransactionOperation(*this, request.get(), &amp;IDBTransaction::didGetRecordOnServer, &amp;IDBTransaction::getRecordOnServer, range);
</span><span class="cx">     scheduleOperation(WTF::move(operation));
</span><span class="cx"> 
</span><del>-    return WTF::move(request);
</del><ins>+    return request;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void IDBTransaction::getRecordOnServer(TransactionOperation&amp; operation, const IDBKeyRangeData&amp; keyRange)
</span><span class="lines">@@ -732,7 +732,7 @@
</span><span class="cx">     auto operation = createTransactionOperation(*this, request.get(), &amp;IDBTransaction::didClearObjectStoreOnServer, &amp;IDBTransaction::clearObjectStoreOnServer, objectStoreIdentifier);
</span><span class="cx">     scheduleOperation(WTF::move(operation));
</span><span class="cx"> 
</span><del>-    return WTF::move(request);
</del><ins>+    return request;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void IDBTransaction::clearObjectStoreOnServer(TransactionOperation&amp; operation, const uint64_t&amp; objectStoreIdentifier)
</span><span class="lines">@@ -763,7 +763,7 @@
</span><span class="cx">     auto operation = createTransactionOperation(*this, request.get(), &amp;IDBTransaction::didPutOrAddOnServer, &amp;IDBTransaction::putOrAddOnServer, key, &amp;value, overwriteMode);
</span><span class="cx">     scheduleOperation(WTF::move(operation));
</span><span class="cx"> 
</span><del>-    return WTF::move(request);
</del><ins>+    return request;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void IDBTransaction::putOrAddOnServer(TransactionOperation&amp; operation, RefPtr&lt;IDBKey&gt; key, RefPtr&lt;SerializedScriptValue&gt; value, const IndexedDB::ObjectStoreOverwriteMode&amp; overwriteMode)
</span></span></pre></div>
<a id="trunkSourceWebCoreModulesindexeddbserverUniqueIDBDatabasecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/indexeddb/server/UniqueIDBDatabase.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/indexeddb/server/UniqueIDBDatabase.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/Modules/indexeddb/server/UniqueIDBDatabase.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -1085,13 +1085,13 @@
</span><span class="cx"> 
</span><span class="cx">     hadDeferredTransactions = !deferredTransactions.isEmpty();
</span><span class="cx">     if (!hadDeferredTransactions)
</span><del>-        return WTF::move(currentTransaction);
</del><ins>+        return currentTransaction;
</ins><span class="cx"> 
</span><span class="cx">     // Prepend the deferred transactions back on the beginning of the deque for future scheduling passes.
</span><span class="cx">     while (!deferredTransactions.isEmpty())
</span><span class="cx">         m_pendingTransactions.prepend(deferredTransactions.takeLast());
</span><span class="cx"> 
</span><del>-    return WTF::move(currentTransaction);
</del><ins>+    return currentTransaction;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void UniqueIDBDatabase::inProgressTransactionCompleted(const IDBResourceIdentifier&amp; transactionIdentifier)
</span></span></pre></div>
<a id="trunkSourceWebCoreModulesindexeddbsharedIDBDatabaseInfocpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/indexeddb/shared/IDBDatabaseInfo.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/indexeddb/shared/IDBDatabaseInfo.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/Modules/indexeddb/shared/IDBDatabaseInfo.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -47,7 +47,7 @@
</span><span class="cx">     info.m_name = m_name.isolatedCopy();
</span><span class="cx">     info.m_version = m_version;
</span><span class="cx"> 
</span><del>-    return WTF::move(info);
</del><ins>+    return info;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> bool IDBDatabaseInfo::hasObjectStore(const String&amp; name) const
</span><span class="lines">@@ -123,7 +123,7 @@
</span><span class="cx">     for (auto&amp; objectStore : m_objectStoreMap.values())
</span><span class="cx">         names.uncheckedAppend(objectStore.name());
</span><span class="cx"> 
</span><del>-    return WTF::move(names);
</del><ins>+    return names;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void IDBDatabaseInfo::deleteObjectStore(const String&amp; objectStoreName)
</span></span></pre></div>
<a id="trunkSourceWebCoreModulesindexeddbsharedIDBResultDatacpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/indexeddb/shared/IDBResultData.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/indexeddb/shared/IDBResultData.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/Modules/indexeddb/shared/IDBResultData.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -67,7 +67,7 @@
</span><span class="cx">     IDBResultData result(requestIdentifier);
</span><span class="cx">     result.m_type = IDBResultType::Error;
</span><span class="cx">     result.m_error = error;
</span><del>-    return WTF::move(result);
</del><ins>+    return result;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> IDBResultData IDBResultData::openDatabaseSuccess(const IDBResourceIdentifier&amp; requestIdentifier, IDBServer::UniqueIDBDatabaseConnection&amp; connection)
</span><span class="lines">@@ -76,7 +76,7 @@
</span><span class="cx">     result.m_type = IDBResultType::OpenDatabaseSuccess;
</span><span class="cx">     result.m_databaseConnectionIdentifier = connection.identifier();
</span><span class="cx">     result.m_databaseInfo = std::make_unique&lt;IDBDatabaseInfo&gt;(connection.database().info());
</span><del>-    return WTF::move(result);
</del><ins>+    return result;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> 
</span><span class="lines">@@ -87,7 +87,7 @@
</span><span class="cx">     result.m_databaseConnectionIdentifier = transaction.databaseConnection().identifier();
</span><span class="cx">     result.m_databaseInfo = std::make_unique&lt;IDBDatabaseInfo&gt;(transaction.databaseConnection().database().info());
</span><span class="cx">     result.m_transactionInfo = std::make_unique&lt;IDBTransactionInfo&gt;(transaction.info());
</span><del>-    return WTF::move(result);
</del><ins>+    return result;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> IDBResultData IDBResultData::deleteDatabaseSuccess(const IDBResourceIdentifier&amp; requestIdentifier, const IDBDatabaseInfo&amp; info)
</span></span></pre></div>
<a id="trunkSourceWebCoreModulesindexeddbsharedIDBTransactionInfocpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/indexeddb/shared/IDBTransactionInfo.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/indexeddb/shared/IDBTransactionInfo.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/Modules/indexeddb/shared/IDBTransactionInfo.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -53,7 +53,7 @@
</span><span class="cx">     result.m_newVersion = newVersion;
</span><span class="cx">     result.m_originalDatabaseInfo = std::make_unique&lt;IDBDatabaseInfo&gt;(originalDatabaseInfo);
</span><span class="cx"> 
</span><del>-    return WTF::move(result);
</del><ins>+    return result;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> IDBTransactionInfo::IDBTransactionInfo(const IDBTransactionInfo&amp; info)
</span><span class="lines">@@ -79,7 +79,7 @@
</span><span class="cx">     if (m_originalDatabaseInfo)
</span><span class="cx">         result.m_originalDatabaseInfo = std::make_unique&lt;IDBDatabaseInfo&gt;(*m_originalDatabaseInfo);
</span><span class="cx"> 
</span><del>-    return WTF::move(result);
</del><ins>+    return result;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> #ifndef NDEBUG
</span></span></pre></div>
<a id="trunkSourceWebCoreModulesindexeddbsharedInProcessIDBServercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/indexeddb/shared/InProcessIDBServer.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/indexeddb/shared/InProcessIDBServer.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/Modules/indexeddb/shared/InProcessIDBServer.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -44,7 +44,7 @@
</span><span class="cx"> {
</span><span class="cx">     Ref&lt;InProcessIDBServer&gt; server = adoptRef(*new InProcessIDBServer);
</span><span class="cx">     server-&gt;m_server-&gt;registerConnection(server-&gt;connectionToClient());
</span><del>-    return WTF::move(server);
</del><ins>+    return server;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> InProcessIDBServer::InProcessIDBServer()
</span></span></pre></div>
<a id="trunkSourceWebCoreModuleswebaudioOfflineAudioContextcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/webaudio/OfflineAudioContext.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/webaudio/OfflineAudioContext.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/Modules/webaudio/OfflineAudioContext.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -51,7 +51,7 @@
</span><span class="cx"> 
</span><span class="cx">     RefPtr&lt;OfflineAudioContext&gt; audioContext(adoptRef(new OfflineAudioContext(document, numberOfChannels, numberOfFrames, sampleRate)));
</span><span class="cx">     audioContext-&gt;suspendIfNeeded();
</span><del>-    return WTF::move(audioContext);
</del><ins>+    return audioContext;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> OfflineAudioContext::OfflineAudioContext(Document&amp; document, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate)
</span></span></pre></div>
<a id="trunkSourceWebCoreModuleswebdatabaseDatabaseTrackercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/webdatabase/DatabaseTracker.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/webdatabase/DatabaseTracker.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/Modules/webdatabase/DatabaseTracker.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -667,7 +667,7 @@
</span><span class="cx">     ASSERT(lock);
</span><span class="cx">     addResult.iterator-&gt;value = lock;
</span><span class="cx"> 
</span><del>-    return WTF::move(lock);
</del><ins>+    return lock;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void DatabaseTracker::deleteOriginLockFor(SecurityOrigin* origin)
</span></span></pre></div>
<a id="trunkSourceWebCoreModuleswebsocketsWebSocketcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/websockets/WebSocket.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/websockets/WebSocket.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/Modules/websockets/WebSocket.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -183,7 +183,7 @@
</span><span class="cx">     if (ec)
</span><span class="cx">         return nullptr;
</span><span class="cx"> 
</span><del>-    return WTF::move(webSocket);
</del><ins>+    return webSocket;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> RefPtr&lt;WebSocket&gt; WebSocket::create(ScriptExecutionContext&amp; context, const String&amp; url, const String&amp; protocol, ExceptionCode&amp; ec)
</span></span></pre></div>
<a id="trunkSourceWebCorecssCSSPrimitiveValuecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/css/CSSPrimitiveValue.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/css/CSSPrimitiveValue.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/css/CSSPrimitiveValue.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -976,7 +976,7 @@
</span><span class="cx">     for (unsigned i = 0; i &lt; suffixLength; ++i)
</span><span class="cx">         buffer[length + i] = static_cast&lt;LChar&gt;(suffix[i]);
</span><span class="cx"> 
</span><del>-    return WTF::move(string);
</del><ins>+    return string;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> template &lt;unsigned characterCount&gt;
</span></span></pre></div>
<a id="trunkSourceWebCoredomNodeOrStringcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/dom/NodeOrString.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/dom/NodeOrString.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/dom/NodeOrString.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -61,7 +61,7 @@
</span><span class="cx">         }
</span><span class="cx">     }
</span><span class="cx">     
</span><del>-    return WTF::move(nodeToReturn);
</del><ins>+    return nodeToReturn;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> } // namespace WebCore
</span></span></pre></div>
<a id="trunkSourceWebCoreinspectorInspectorApplicationCacheAgentcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/inspector/InspectorApplicationCacheAgent.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/inspector/InspectorApplicationCacheAgent.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/inspector/InspectorApplicationCacheAgent.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -164,7 +164,7 @@
</span><span class="cx">     for (const auto&amp; resourceInfo : applicationCacheResources)
</span><span class="cx">         resources-&gt;addItem(buildObjectForApplicationCacheResource(resourceInfo));
</span><span class="cx"> 
</span><del>-    return WTF::move(resources);
</del><ins>+    return resources;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;Inspector::Protocol::ApplicationCache::ApplicationCacheResource&gt; InspectorApplicationCacheAgent::buildObjectForApplicationCacheResource(const ApplicationCacheHost::ResourceInfo&amp; resourceInfo)
</span></span></pre></div>
<a id="trunkSourceWebCoreinspectorInspectorDOMAgentcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/inspector/InspectorDOMAgent.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/inspector/InspectorDOMAgent.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/inspector/InspectorDOMAgent.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -1376,7 +1376,7 @@
</span><span class="cx">             value-&gt;setRole(axObject-&gt;computedRoleString());
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    return WTF::move(value);
</del><ins>+    return value;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;Inspector::Protocol::Array&lt;String&gt;&gt; InspectorDOMAgent::buildArrayForElementAttributes(Element* element)
</span><span class="lines">@@ -1384,13 +1384,13 @@
</span><span class="cx">     auto attributesValue = Inspector::Protocol::Array&lt;String&gt;::create();
</span><span class="cx">     // Go through all attributes and serialize them.
</span><span class="cx">     if (!element-&gt;hasAttributes())
</span><del>-        return WTF::move(attributesValue);
</del><ins>+        return attributesValue;
</ins><span class="cx">     for (const Attribute&amp; attribute : element-&gt;attributesIterator()) {
</span><span class="cx">         // Add attribute pair
</span><span class="cx">         attributesValue-&gt;addItem(attribute.name().toString());
</span><span class="cx">         attributesValue-&gt;addItem(attribute.value());
</span><span class="cx">     }
</span><del>-    return WTF::move(attributesValue);
</del><ins>+    return attributesValue;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;Inspector::Protocol::Array&lt;Inspector::Protocol::DOM::Node&gt;&gt; InspectorDOMAgent::buildArrayForContainerChildren(Node* container, int depth, NodeToIdMap* nodesMap)
</span><span class="lines">@@ -1403,7 +1403,7 @@
</span><span class="cx">             children-&gt;addItem(buildObjectForNode(firstChild, 0, nodesMap));
</span><span class="cx">             m_childrenRequested.add(bind(container, nodesMap));
</span><span class="cx">         }
</span><del>-        return WTF::move(children);
</del><ins>+        return children;
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     Node* child = innerFirstChild(container);
</span><span class="lines">@@ -1414,7 +1414,7 @@
</span><span class="cx">         children-&gt;addItem(buildObjectForNode(child, depth, nodesMap));
</span><span class="cx">         child = innerNextSibling(child);
</span><span class="cx">     }
</span><del>-    return WTF::move(children);
</del><ins>+    return children;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> RefPtr&lt;Inspector::Protocol::Array&lt;Inspector::Protocol::DOM::Node&gt;&gt; InspectorDOMAgent::buildArrayForPseudoElements(const Element&amp; element, NodeToIdMap* nodesMap)
</span><span class="lines">@@ -1481,7 +1481,7 @@
</span><span class="cx">         if (!sourceName.isEmpty())
</span><span class="cx">             value-&gt;setSourceName(sourceName);
</span><span class="cx">     }
</span><del>-    return WTF::move(value);
</del><ins>+    return value;
</ins><span class="cx"> }
</span><span class="cx">     
</span><span class="cx"> void InspectorDOMAgent::processAccessibilityChildren(RefPtr&lt;AccessibilityObject&gt;&amp;&amp; axObject, RefPtr&lt;Inspector::Protocol::Array&lt;int&gt;&gt;&amp;&amp; childNodeIds)
</span></span></pre></div>
<a id="trunkSourceWebCoreinspectorInspectorIndexedDBAgentcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/inspector/InspectorIndexedDBAgent.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/inspector/InspectorIndexedDBAgent.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/inspector/InspectorIndexedDBAgent.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -225,7 +225,7 @@
</span><span class="cx">     RefPtr&lt;IDBTransaction&gt; idbTransaction = idbDatabase-&gt;transaction(scriptExecutionContext, objectStoreName, mode, ec);
</span><span class="cx">     if (ec.code)
</span><span class="cx">         return nullptr;
</span><del>-    return WTF::move(idbTransaction);
</del><ins>+    return idbTransaction;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> static RefPtr&lt;IDBObjectStore&gt; objectStoreForTransaction(IDBTransaction* idbTransaction, const String&amp; objectStoreName)
</span><span class="lines">@@ -234,7 +234,7 @@
</span><span class="cx">     RefPtr&lt;IDBObjectStore&gt; idbObjectStore = idbTransaction-&gt;objectStore(objectStoreName, ec);
</span><span class="cx">     if (ec.code)
</span><span class="cx">         return nullptr;
</span><del>-    return WTF::move(idbObjectStore);
</del><ins>+    return idbObjectStore;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> static RefPtr&lt;IDBIndex&gt; indexForObjectStore(IDBObjectStore* idbObjectStore, const String&amp; indexName)
</span><span class="lines">@@ -243,7 +243,7 @@
</span><span class="cx">     RefPtr&lt;IDBIndex&gt; idbIndex = idbObjectStore-&gt;index(indexName, ec);
</span><span class="cx">     if (ec.code)
</span><span class="cx">         return nullptr;
</span><del>-    return WTF::move(idbIndex);
</del><ins>+    return idbIndex;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> static RefPtr&lt;KeyPath&gt; keyPathFromIDBKeyPath(const IDBKeyPath&amp; idbKeyPath)
</span><span class="lines">@@ -276,7 +276,7 @@
</span><span class="cx">         ASSERT_NOT_REACHED();
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    return WTF::move(keyPath);
</del><ins>+    return keyPath;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> class DatabaseLoader : public ExecutableWithDatabase {
</span></span></pre></div>
<a id="trunkSourceWebCoreinspectorInspectorLayerTreeAgentcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/inspector/InspectorLayerTreeAgent.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/inspector/InspectorLayerTreeAgent.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/inspector/InspectorLayerTreeAgent.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -196,7 +196,7 @@
</span><span class="cx">             layerObject-&gt;setPseudoElement(&quot;first-line&quot;);
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    return WTF::move(layerObject);
</del><ins>+    return layerObject;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> int InspectorLayerTreeAgent::idForNode(ErrorString&amp; errorString, Node* node)
</span></span></pre></div>
<a id="trunkSourceWebCoreinspectorInspectorNetworkAgentcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/inspector/InspectorNetworkAgent.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/inspector/InspectorNetworkAgent.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/inspector/InspectorNetworkAgent.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -186,7 +186,7 @@
</span><span class="cx">     
</span><span class="cx">     for (const auto&amp; header : headers)
</span><span class="cx">         headersObject-&gt;setString(header.key, header.value);
</span><del>-    return WTF::move(headersObject);
</del><ins>+    return headersObject;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> static Ref&lt;Inspector::Protocol::Network::ResourceTiming&gt; buildObjectForTiming(const ResourceLoadTiming&amp; timing, DocumentLoader* loader)
</span><span class="lines">@@ -212,7 +212,7 @@
</span><span class="cx">         .release();
</span><span class="cx">     if (request.httpBody() &amp;&amp; !request.httpBody()-&gt;isEmpty())
</span><span class="cx">         requestObject-&gt;setPostData(request.httpBody()-&gt;flattenToString());
</span><del>-    return WTF::move(requestObject);
</del><ins>+    return requestObject;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> static RefPtr&lt;Inspector::Protocol::Network::Response&gt; buildObjectForResourceResponse(const ResourceResponse&amp; response, DocumentLoader* loader)
</span><span class="lines">@@ -252,7 +252,7 @@
</span><span class="cx">     if (!sourceMappingURL.isEmpty())
</span><span class="cx">         resourceObject-&gt;setSourceMapURL(sourceMappingURL);
</span><span class="cx"> 
</span><del>-    return WTF::move(resourceObject);
</del><ins>+    return resourceObject;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> InspectorNetworkAgent::~InspectorNetworkAgent()
</span></span></pre></div>
<a id="trunkSourceWebCoreinspectorInspectorOverlaycpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/inspector/InspectorOverlay.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/inspector/InspectorOverlay.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/inspector/InspectorOverlay.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -372,7 +372,7 @@
</span><span class="cx">     array-&gt;addItem(buildObjectForPoint(quad.p2()));
</span><span class="cx">     array-&gt;addItem(buildObjectForPoint(quad.p3()));
</span><span class="cx">     array-&gt;addItem(buildObjectForPoint(quad.p4()));
</span><del>-    return WTF::move(array);
</del><ins>+    return array;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> static Ref&lt;Inspector::Protocol::OverlayTypes::FragmentHighlightData&gt; buildObjectForHighlight(const Highlight&amp; highlight)
</span><span class="lines">@@ -450,7 +450,7 @@
</span><span class="cx">         arrayOfRegions-&gt;addItem(WTF::move(regionObject));
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    return WTF::move(arrayOfRegions);
</del><ins>+    return arrayOfRegions;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> static Ref&lt;Inspector::Protocol::OverlayTypes::Size&gt; buildObjectForSize(const IntSize&amp; size)
</span><span class="lines">@@ -834,7 +834,7 @@
</span><span class="cx">         }
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    return WTF::move(highlights);
</del><ins>+    return highlights;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void InspectorOverlay::drawNodeHighlight()
</span></span></pre></div>
<a id="trunkSourceWebCoreinspectorInspectorPageAgentcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/inspector/InspectorPageAgent.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/inspector/InspectorPageAgent.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/inspector/InspectorPageAgent.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -130,7 +130,7 @@
</span><span class="cx">         decoder = TextResourceDecoder::create(&quot;text/html&quot;, &quot;UTF-8&quot;);
</span><span class="cx">     else
</span><span class="cx">         decoder = TextResourceDecoder::create(&quot;text/plain&quot;, &quot;UTF-8&quot;);
</span><del>-    return WTF::move(decoder);
</del><ins>+    return decoder;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> bool InspectorPageAgent::cachedResourceContent(CachedResource* cachedResource, String* result, bool* base64Encoded)
</span><span class="lines">@@ -443,7 +443,7 @@
</span><span class="cx">     for (const auto&amp; cookie : cookiesList)
</span><span class="cx">         cookies-&gt;addItem(buildObjectForCookie(cookie));
</span><span class="cx"> 
</span><del>-    return WTF::move(cookies);
</del><ins>+    return cookies;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> static Vector&lt;CachedResource*&gt; cachedResourcesForFrame(Frame* frame)
</span><span class="lines">@@ -908,7 +908,7 @@
</span><span class="cx">         frameObject-&gt;setName(name);
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    return WTF::move(frameObject);
</del><ins>+    return frameObject;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;Inspector::Protocol::Page::FrameResourceTree&gt; InspectorPageAgent::buildObjectForFrameTree(Frame* frame)
</span></span></pre></div>
<a id="trunkSourceWebCoreinspectorInspectorStyleSheetcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/inspector/InspectorStyleSheet.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/inspector/InspectorStyleSheet.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/inspector/InspectorStyleSheet.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -183,7 +183,7 @@
</span><span class="cx">         mediaObject-&gt;setSourceURL(sourceURL);
</span><span class="cx">         mediaObject-&gt;setSourceLine(media-&gt;queries()-&gt;lastLine());
</span><span class="cx">     }
</span><del>-    return WTF::move(mediaObject);
</del><ins>+    return mediaObject;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> static RefPtr&lt;CSSRuleList&gt; asCSSRuleList(CSSStyleSheet* styleSheet)
</span><span class="lines">@@ -327,7 +327,7 @@
</span><span class="cx">         result-&gt;addItem(WTF::move(entry));
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    return WTF::move(result);
</del><ins>+    return result;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> bool InspectorStyle::getText(String* result) const
</span><span class="lines">@@ -875,7 +875,7 @@
</span><span class="cx">         }
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    return WTF::move(inspectorSelector);
</del><ins>+    return inspectorSelector;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> static Ref&lt;Inspector::Protocol::Array&lt;Inspector::Protocol::CSS::CSSSelector&gt;&gt; selectorsFromSource(const CSSRuleSourceData* sourceData, const String&amp; sheetText, const CSSSelectorList&amp; selectorList, Element* element)
</span><span class="lines">@@ -899,7 +899,7 @@
</span><span class="cx"> 
</span><span class="cx">         selector = CSSSelectorList::next(selector);
</span><span class="cx">     }
</span><del>-    return WTF::move(result);
</del><ins>+    return result;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;Inspector::Protocol::CSS::CSSSelector&gt; InspectorStyleSheet::buildObjectForSelector(const CSSSelector* selector, Element* element)
</span><span class="lines">@@ -931,7 +931,7 @@
</span><span class="cx">         .release();
</span><span class="cx">     if (sourceData)
</span><span class="cx">         result-&gt;setRange(buildSourceRangeObject(sourceData-&gt;ruleHeaderRange, lineEndings().get()));
</span><del>-    return WTF::move(result);
</del><ins>+    return result;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> RefPtr&lt;Inspector::Protocol::CSS::CSSRule&gt; InspectorStyleSheet::buildObjectForRule(CSSStyleRule* rule, Element* element)
</span><span class="lines">@@ -992,7 +992,7 @@
</span><span class="cx">         }
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    return WTF::move(result);
</del><ins>+    return result;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> bool InspectorStyleSheet::setStyleText(const InspectorCSSId&amp; id, const String&amp; text, String* oldText, ExceptionCode&amp; ec)
</span><span class="lines">@@ -1231,7 +1231,7 @@
</span><span class="cx"> {
</span><span class="cx">     auto result = Inspector::Protocol::Array&lt;Inspector::Protocol::CSS::CSSRule&gt;::create();
</span><span class="cx">     if (!ruleList)
</span><del>-        return WTF::move(result);
</del><ins>+        return result;
</ins><span class="cx"> 
</span><span class="cx">     RefPtr&lt;CSSRuleList&gt; refRuleList = ruleList;
</span><span class="cx">     CSSStyleRuleVector rules;
</span><span class="lines">@@ -1240,7 +1240,7 @@
</span><span class="cx">     for (auto&amp; rule : rules)
</span><span class="cx">         result-&gt;addItem(buildObjectForRule(rule.get(), nullptr));
</span><span class="cx"> 
</span><del>-    return WTF::move(result);
</del><ins>+    return result;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void InspectorStyleSheet::collectFlatRules(RefPtr&lt;CSSRuleList&gt;&amp;&amp; ruleList, CSSStyleRuleVector* result)
</span></span></pre></div>
<a id="trunkSourceWebCoreinspectorInspectorTimelineAgentcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/inspector/InspectorTimelineAgent.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/inspector/InspectorTimelineAgent.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/inspector/InspectorTimelineAgent.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -266,7 +266,7 @@
</span><span class="cx">             if (!m_enabledFromFrontend &amp;&amp; m_pendingConsoleProfileRecords.isEmpty())
</span><span class="cx">                 internalStop();
</span><span class="cx"> 
</span><del>-            return WTF::move(profile);
</del><ins>+            return profile;
</ins><span class="cx">         }
</span><span class="cx">     }
</span><span class="cx"> 
</span></span></pre></div>
<a id="trunkSourceWebCoreinspectorTimelineRecordFactorycpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/inspector/TimelineRecordFactory.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/inspector/TimelineRecordFactory.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/inspector/TimelineRecordFactory.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -55,7 +55,7 @@
</span><span class="cx">         if (stackTrace &amp;&amp; stackTrace-&gt;size())
</span><span class="cx">             record-&gt;setValue(ASCIILiteral(&quot;stackTrace&quot;), stackTrace-&gt;buildInspectorArray());
</span><span class="cx">     }
</span><del>-    return WTF::move(record);
</del><ins>+    return record;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;InspectorObject&gt; TimelineRecordFactory::createFunctionCallData(const String&amp; scriptName, int scriptLine)
</span><span class="lines">@@ -63,14 +63,14 @@
</span><span class="cx">     Ref&lt;InspectorObject&gt; data = InspectorObject::create();
</span><span class="cx">     data-&gt;setString(ASCIILiteral(&quot;scriptName&quot;), scriptName);
</span><span class="cx">     data-&gt;setInteger(ASCIILiteral(&quot;scriptLine&quot;), scriptLine);
</span><del>-    return WTF::move(data);
</del><ins>+    return data;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;InspectorObject&gt; TimelineRecordFactory::createConsoleProfileData(const String&amp; title)
</span><span class="cx"> {
</span><span class="cx">     Ref&lt;InspectorObject&gt; data = InspectorObject::create();
</span><span class="cx">     data-&gt;setString(ASCIILiteral(&quot;title&quot;), title);
</span><del>-    return WTF::move(data);
</del><ins>+    return data;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;InspectorObject&gt; TimelineRecordFactory::createProbeSampleData(const ScriptBreakpointAction&amp; action, unsigned sampleId)
</span><span class="lines">@@ -78,21 +78,21 @@
</span><span class="cx">     Ref&lt;InspectorObject&gt; data = InspectorObject::create();
</span><span class="cx">     data-&gt;setInteger(ASCIILiteral(&quot;probeId&quot;), action.identifier);
</span><span class="cx">     data-&gt;setInteger(ASCIILiteral(&quot;sampleId&quot;), sampleId);
</span><del>-    return WTF::move(data);
</del><ins>+    return data;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;InspectorObject&gt; TimelineRecordFactory::createEventDispatchData(const Event&amp; event)
</span><span class="cx"> {
</span><span class="cx">     Ref&lt;InspectorObject&gt; data = InspectorObject::create();
</span><span class="cx">     data-&gt;setString(ASCIILiteral(&quot;type&quot;), event.type().string());
</span><del>-    return WTF::move(data);
</del><ins>+    return data;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;InspectorObject&gt; TimelineRecordFactory::createGenericTimerData(int timerId)
</span><span class="cx"> {
</span><span class="cx">     Ref&lt;InspectorObject&gt; data = InspectorObject::create();
</span><span class="cx">     data-&gt;setInteger(ASCIILiteral(&quot;timerId&quot;), timerId);
</span><del>-    return WTF::move(data);
</del><ins>+    return data;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;InspectorObject&gt; TimelineRecordFactory::createTimerInstallData(int timerId, int timeout, bool singleShot)
</span><span class="lines">@@ -101,7 +101,7 @@
</span><span class="cx">     data-&gt;setInteger(ASCIILiteral(&quot;timerId&quot;), timerId);
</span><span class="cx">     data-&gt;setInteger(ASCIILiteral(&quot;timeout&quot;), timeout);
</span><span class="cx">     data-&gt;setBoolean(ASCIILiteral(&quot;singleShot&quot;), singleShot);
</span><del>-    return WTF::move(data);
</del><ins>+    return data;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;InspectorObject&gt; TimelineRecordFactory::createEvaluateScriptData(const String&amp; url, double lineNumber)
</span><span class="lines">@@ -109,21 +109,21 @@
</span><span class="cx">     Ref&lt;InspectorObject&gt; data = InspectorObject::create();
</span><span class="cx">     data-&gt;setString(ASCIILiteral(&quot;url&quot;), url);
</span><span class="cx">     data-&gt;setInteger(ASCIILiteral(&quot;lineNumber&quot;), lineNumber);
</span><del>-    return WTF::move(data);
</del><ins>+    return data;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;InspectorObject&gt; TimelineRecordFactory::createTimeStampData(const String&amp; message)
</span><span class="cx"> {
</span><span class="cx">     Ref&lt;InspectorObject&gt; data = InspectorObject::create();
</span><span class="cx">     data-&gt;setString(ASCIILiteral(&quot;message&quot;), message);
</span><del>-    return WTF::move(data);
</del><ins>+    return data;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;InspectorObject&gt; TimelineRecordFactory::createAnimationFrameData(int callbackId)
</span><span class="cx"> {
</span><span class="cx">     Ref&lt;InspectorObject&gt; data = InspectorObject::create();
</span><span class="cx">     data-&gt;setInteger(ASCIILiteral(&quot;id&quot;), callbackId);
</span><del>-    return WTF::move(data);
</del><ins>+    return data;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> static Ref&lt;InspectorArray&gt; createQuad(const FloatQuad&amp; quad)
</span><span class="lines">@@ -137,14 +137,14 @@
</span><span class="cx">     array-&gt;pushDouble(quad.p3().y());
</span><span class="cx">     array-&gt;pushDouble(quad.p4().x());
</span><span class="cx">     array-&gt;pushDouble(quad.p4().y());
</span><del>-    return WTF::move(array);
</del><ins>+    return array;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> Ref&lt;InspectorObject&gt; TimelineRecordFactory::createPaintData(const FloatQuad&amp; quad)
</span><span class="cx"> {
</span><span class="cx">     Ref&lt;InspectorObject&gt; data = InspectorObject::create();
</span><span class="cx">     data-&gt;setArray(ASCIILiteral(&quot;clip&quot;), createQuad(quad));
</span><del>-    return WTF::move(data);
</del><ins>+    return data;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void TimelineRecordFactory::appendLayoutRoot(InspectorObject* data, const FloatQuad&amp; quad)
</span><span class="lines">@@ -192,7 +192,7 @@
</span><span class="cx">         result-&gt;setChildren(WTF::move(children));
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    return WTF::move(result);
</del><ins>+    return result;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> static Ref&lt;Protocol::Timeline::CPUProfile&gt; buildProfileInspectorObject(const JSC::Profile* profile)
</span></span></pre></div>
<a id="trunkSourceWebCoreloaderFrameLoadercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/loader/FrameLoader.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/loader/FrameLoader.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/loader/FrameLoader.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -3523,7 +3523,7 @@
</span><span class="cx">                 if (Page* page = frame-&gt;page())
</span><span class="cx">                     page-&gt;chrome().focus();
</span><span class="cx">             }
</span><del>-            return WTF::move(frame);
</del><ins>+            return frame;
</ins><span class="cx">         }
</span><span class="cx">     }
</span><span class="cx"> 
</span><span class="lines">@@ -3615,7 +3615,7 @@
</span><span class="cx">     page-&gt;chrome().show();
</span><span class="cx"> 
</span><span class="cx">     created = true;
</span><del>-    return WTF::move(frame);
</del><ins>+    return frame;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> } // namespace WebCore
</span></span></pre></div>
<a id="trunkSourceWebCoreloaderNavigationActioncpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/loader/NavigationAction.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/loader/NavigationAction.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/loader/NavigationAction.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -106,7 +106,7 @@
</span><span class="cx"> {
</span><span class="cx">     NavigationAction result(*this);
</span><span class="cx">     result.m_shouldOpenExternalURLsPolicy = shouldOpenExternalURLsPolicy;
</span><del>-    return WTF::move(result);
</del><ins>+    return result;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> }
</span></span></pre></div>
<a id="trunkSourceWebCorepageDOMWindowcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/DOMWindow.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/DOMWindow.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/page/DOMWindow.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -2128,7 +2128,7 @@
</span><span class="cx">     newFrame-&gt;page()-&gt;setOpenedByDOM();
</span><span class="cx"> 
</span><span class="cx">     if (newFrame-&gt;document()-&gt;domWindow()-&gt;isInsecureScriptAccess(activeWindow, completedURL))
</span><del>-        return WTF::move(newFrame);
</del><ins>+        return newFrame;
</ins><span class="cx"> 
</span><span class="cx">     if (prepareDialogFunction)
</span><span class="cx">         prepareDialogFunction(*newFrame-&gt;document()-&gt;domWindow());
</span><span class="lines">@@ -2146,7 +2146,7 @@
</span><span class="cx">     if (!newFrame-&gt;page())
</span><span class="cx">         return nullptr;
</span><span class="cx"> 
</span><del>-    return WTF::move(newFrame);
</del><ins>+    return newFrame;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> PassRefPtr&lt;DOMWindow&gt; DOMWindow::open(const String&amp; urlString, const AtomicString&amp; frameName, const String&amp; windowFeaturesString,
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformnetworkiosQuickLookmm"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/network/ios/QuickLook.mm (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/network/ios/QuickLook.mm        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/platform/network/ios/QuickLook.mm        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -403,7 +403,7 @@
</span><span class="cx"> 
</span><span class="cx">     std::unique_ptr&lt;QuickLookHandle&gt; quickLookHandle(new QuickLookHandle([handle-&gt;firstRequest().nsURLRequest(DoNotUpdateHTTPBody) URL], connection, nsResponse, delegate));
</span><span class="cx">     handle-&gt;client()-&gt;didCreateQuickLookHandle(*quickLookHandle);
</span><del>-    return WTF::move(quickLookHandle);
</del><ins>+    return quickLookHandle;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> #if USE(CFNETWORK)
</span><span class="lines">@@ -417,7 +417,7 @@
</span><span class="cx">     WebQuickLookHandleAsDelegate *delegate = [[[WebQuickLookHandleAsDelegate alloc] initWithConnectionDelegate:connectionDelegate] autorelease];
</span><span class="cx">     std::unique_ptr&lt;QuickLookHandle&gt; quickLookHandle(new QuickLookHandle([handle-&gt;firstRequest().nsURLRequest(DoNotUpdateHTTPBody) URL], nil, nsResponse, delegate));
</span><span class="cx">     handle-&gt;client()-&gt;didCreateQuickLookHandle(*quickLookHandle);
</span><del>-    return WTF::move(quickLookHandle);
</del><ins>+    return quickLookHandle;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> CFURLResponseRef QuickLookHandle::cfResponse()
</span><span class="lines">@@ -439,7 +439,7 @@
</span><span class="cx">     std::unique_ptr&lt;QuickLookHandle&gt; quickLookHandle(new QuickLookHandle([loader.originalRequest().nsURLRequest(DoNotUpdateHTTPBody) URL], nil, response.nsURLResponse(), delegate.get()));
</span><span class="cx">     [delegate setQuickLookHandle:quickLookHandle.get()];
</span><span class="cx">     loader.didCreateQuickLookHandle(*quickLookHandle);
</span><del>-    return WTF::move(quickLookHandle);
</del><ins>+    return quickLookHandle;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> NSURLResponse *QuickLookHandle::nsResponse()
</span></span></pre></div>
<a id="trunkSourceWebCoretestingInternalscpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/testing/Internals.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/testing/Internals.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/testing/Internals.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -1801,7 +1801,7 @@
</span><span class="cx">     RefPtr&lt;DOMWindow&gt; frontendWindow = window-&gt;open(url, &quot;&quot;, &quot;&quot;, *window, *window);
</span><span class="cx">     m_inspectorFrontend = std::make_unique&lt;InspectorStubFrontend&gt;(inspectedPage, frontendWindow.copyRef());
</span><span class="cx"> 
</span><del>-    return WTF::move(frontendWindow);
</del><ins>+    return frontendWindow;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void Internals::closeDummyInspectorFrontend()
</span></span></pre></div>
<a id="trunkSourceWebCoreworkersWorkerScriptLoadercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/workers/WorkerScriptLoader.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/workers/WorkerScriptLoader.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/workers/WorkerScriptLoader.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -101,7 +101,7 @@
</span><span class="cx"> {
</span><span class="cx">     auto request = std::make_unique&lt;ResourceRequest&gt;(m_url);
</span><span class="cx">     request-&gt;setHTTPMethod(&quot;GET&quot;);
</span><del>-    return WTF::move(request);
</del><ins>+    return request;
</ins><span class="cx"> }
</span><span class="cx">     
</span><span class="cx"> void WorkerScriptLoader::didReceiveResponse(unsigned long identifier, const ResourceResponse&amp; response)
</span></span></pre></div>
<a id="trunkSourceWebCorexmlXPathExpressioncpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/xml/XPathExpression.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/xml/XPathExpression.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebCore/xml/XPathExpression.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -87,7 +87,7 @@
</span><span class="cx">             return nullptr;
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    return WTF::move(result);
</del><ins>+    return result;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> }
</span></span></pre></div>
<a id="trunkSourceWebKit2ChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/ChangeLog (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/ChangeLog        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebKit2/ChangeLog        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -1,3 +1,18 @@
</span><ins>+2015-12-25  Andy Estes  &lt;aestes@apple.com&gt;
+
+        Stop moving local objects in return statements
+        https://bugs.webkit.org/show_bug.cgi?id=152557
+
+        Reviewed by Brady Eidson.
+
+        Calling std::move() on a local object in a return statement prevents the compiler from applying the return value optimization.
+
+        Clang can warn about these mistakes with -Wpessimizing-move, although only when std::move() is called directly.
+        I found these issues by temporarily replacing WTF::move with std::move and recompiling.
+
+        * UIProcess/WebPageProxy.cpp:
+        (WebKit::ExceededDatabaseQuotaRecords::createRecord):
+
</ins><span class="cx"> 2015-12-26  Joonghun Park  &lt;jh718.park@samsung.com&gt;
</span><span class="cx"> 
</span><span class="cx">         [WK2][EFL] Use eina_file_path_join at platformDefaultIconDatabasePath in WebProcessPoolEfl
</span></span></pre></div>
<a id="trunkSourceWebKit2UIProcessWebPageProxycpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/UIProcess/WebPageProxy.cpp (194427 => 194428)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/UIProcess/WebPageProxy.cpp        2015-12-28 03:01:04 UTC (rev 194427)
+++ trunk/Source/WebKit2/UIProcess/WebPageProxy.cpp        2015-12-28 16:26:24 UTC (rev 194428)
</span><span class="lines">@@ -239,7 +239,7 @@
</span><span class="cx">     record-&gt;currentDatabaseUsage = currentDatabaseUsage;
</span><span class="cx">     record-&gt;expectedUsage = expectedUsage;
</span><span class="cx">     record-&gt;reply = reply;
</span><del>-    return WTF::move(record);
</del><ins>+    return record;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void ExceededDatabaseQuotaRecords::add(std::unique_ptr&lt;ExceededDatabaseQuotaRecords::Record&gt; record)
</span></span></pre>
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