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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/177328">177328</a></dd>
<dt>Author</dt> <dd>cdumez@apple.com</dd>
<dt>Date</dt> <dd>2014-12-15 18:08:23 -0800 (Mon, 15 Dec 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>[iOS] Add feature counting support
https://bugs.webkit.org/show_bug.cgi?id=139652
<rdar://problem/19255690>
Reviewed by Gavin Barraclough.
Source/JavaScriptCore:
Link against AppSupport framework on iOS as we need it to implement
the new FeatureCounter API in WTF.
* Configurations/JavaScriptCore.xcconfig:
Source/WebCore:
Use FeatureCounter API to log PageCache failure reasons
as well as its success rate.
No new tests, no behavior change.
* history/PageCache.cpp:
(WebCore::logCanCacheFrameDecision):
(WebCore::logCanCachePageDecision):
(WebCore::PageCache::canCache):
* platform/FeatureCounterKeys.h: Added.
Source/WTF:
Add a FeatureCounter API for to log / count when a feature
is used. For now, this is only implementated on iOS.
* WTF.vcxproj/WTF.vcxproj:
* WTF.xcodeproj/project.pbxproj:
* wtf/CMakeLists.txt:
* wtf/FeatureCounter.cpp: Added.
(WTF::incrementFeatureCounterKey):
(WTF::setFeatureCounterKey):
* wtf/FeatureCounter.h: Added.
* wtf/ios/FeatureCounter.mm: Added.
(WTF::incrementFeatureCounterKey):
(WTF::setFeatureCounterKey):</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCoreConfigurationsJavaScriptCorexcconfig">trunk/Source/JavaScriptCore/Configurations/JavaScriptCore.xcconfig</a></li>
<li><a href="#trunkSourceWTFChangeLog">trunk/Source/WTF/ChangeLog</a></li>
<li><a href="#trunkSourceWTFWTFvcxprojWTFvcxproj">trunk/Source/WTF/WTF.vcxproj/WTF.vcxproj</a></li>
<li><a href="#trunkSourceWTFWTFxcodeprojprojectpbxproj">trunk/Source/WTF/WTF.xcodeproj/project.pbxproj</a></li>
<li><a href="#trunkSourceWTFwtfCMakeListstxt">trunk/Source/WTF/wtf/CMakeLists.txt</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCorehistoryPageCachecpp">trunk/Source/WebCore/history/PageCache.cpp</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunkSourceWTFwtfFeatureCountercpp">trunk/Source/WTF/wtf/FeatureCounter.cpp</a></li>
<li><a href="#trunkSourceWTFwtfFeatureCounterh">trunk/Source/WTF/wtf/FeatureCounter.h</a></li>
<li><a href="#trunkSourceWTFwtfiosFeatureCountermm">trunk/Source/WTF/wtf/ios/FeatureCounter.mm</a></li>
<li><a href="#trunkSourceWebCoreplatformFeatureCounterKeysh">trunk/Source/WebCore/platform/FeatureCounterKeys.h</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (177327 => 177328)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog        2014-12-16 01:38:36 UTC (rev 177327)
+++ trunk/Source/JavaScriptCore/ChangeLog        2014-12-16 02:08:23 UTC (rev 177328)
</span><span class="lines">@@ -1,3 +1,16 @@
</span><ins>+2014-12-15 Chris Dumez <cdumez@apple.com>
+
+ [iOS] Add feature counting support
+ https://bugs.webkit.org/show_bug.cgi?id=139652
+ <rdar://problem/19255690>
+
+ Reviewed by Gavin Barraclough.
+
+ Link against AppSupport framework on iOS as we need it to implement
+ the new FeatureCounter API in WTF.
+
+ * Configurations/JavaScriptCore.xcconfig:
+
</ins><span class="cx"> 2014-12-15 Commit Queue <commit-queue@webkit.org>
</span><span class="cx">
</span><span class="cx"> Unreviewed, rolling out r177284.
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreConfigurationsJavaScriptCorexcconfig"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/Configurations/JavaScriptCore.xcconfig (177327 => 177328)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/Configurations/JavaScriptCore.xcconfig        2014-12-16 01:38:36 UTC (rev 177327)
+++ trunk/Source/JavaScriptCore/Configurations/JavaScriptCore.xcconfig        2014-12-16 02:08:23 UTC (rev 177328)
</span><span class="lines">@@ -37,7 +37,7 @@
</span><span class="cx"> OTHER_LDFLAGS_HIDE_SYMBOLS = -Wl,-unexported_symbol -Wl,__ZTISt9bad_alloc -Wl,-unexported_symbol -Wl,__ZTISt9exception -Wl,-unexported_symbol -Wl,__ZTSSt9bad_alloc -Wl,-unexported_symbol -Wl,__ZTSSt9exception -Wl,-unexported_symbol -Wl,__ZdlPvS_ -Wl,-unexported_symbol -Wl,__ZnwmPv -Wl,-unexported_symbol -Wl,__ZNKSt3__18functionIFvvEEclEv -Wl,-unexported_symbol -Wl,__ZNSt3__18functionIFvvEEC1EOS2_ -Wl,-unexported_symbol -Wl,__ZNSt3__18functionIFvvEEC2EOS2_ -Wl,-unexported_symbol -Wl,__ZNKSt3__18functionIFvRN3JSC17BytecodeGeneratorEPNS1_10RegisterIDEEEclES3_S5_ -Wl,-unexported_symbol -Wl,__ZNSt3__18functionIFvRN3JSC17BytecodeGeneratorEPNS1_10RegisterIDEEED1Ev -Wl,-unexported_symbol -Wl,__ZNSt3__18functionIFvRN3JSC17BytecodeGeneratorEPNS1_10RegisterIDEEED2Ev -Wl,-unexported_symbol -Wl,__ZNSt3__18functionIFvvEED1Ev -Wl,-unexported_symbol -Wl,__ZNSt3__18functionIFvvEED2Ev -Wl,-unexported_symbol -Wl,__ZTVNSt3__117bad_function_callE -Wl,-all_load;
</span><span class="cx">
</span><span class="cx"> OTHER_LDFLAGS_BASE = -lobjc -Wl,-Y,3 $(OTHER_LDFLAGS_HIDE_SYMBOLS);
</span><del>-OTHER_LDFLAGS[sdk=iphone*] = $(inherited) $(OTHER_LDFLAGS_BASE);
</del><ins>+OTHER_LDFLAGS[sdk=iphone*] = $(inherited) $(OTHER_LDFLAGS_BASE) -framework AppSupport;
</ins><span class="cx"> OTHER_LDFLAGS[sdk=macosx*] = $(inherited) $(OTHER_LDFLAGS_BASE) -sub_library libobjc -framework CoreServices;
</span><span class="cx">
</span><span class="cx"> SECTORDER_FLAGS[sdk=iphoneos*] = $(SECTORDER_FLAGS_ios_$(CONFIGURATION));
</span></span></pre></div>
<a id="trunkSourceWTFChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WTF/ChangeLog (177327 => 177328)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/ChangeLog        2014-12-16 01:38:36 UTC (rev 177327)
+++ trunk/Source/WTF/ChangeLog        2014-12-16 02:08:23 UTC (rev 177328)
</span><span class="lines">@@ -1,3 +1,25 @@
</span><ins>+2014-12-15 Chris Dumez <cdumez@apple.com>
+
+ [iOS] Add feature counting support
+ https://bugs.webkit.org/show_bug.cgi?id=139652
+ <rdar://problem/19255690>
+
+ Reviewed by Gavin Barraclough.
+
+ Add a FeatureCounter API for to log / count when a feature
+ is used. For now, this is only implementated on iOS.
+
+ * WTF.vcxproj/WTF.vcxproj:
+ * WTF.xcodeproj/project.pbxproj:
+ * wtf/CMakeLists.txt:
+ * wtf/FeatureCounter.cpp: Added.
+ (WTF::incrementFeatureCounterKey):
+ (WTF::setFeatureCounterKey):
+ * wtf/FeatureCounter.h: Added.
+ * wtf/ios/FeatureCounter.mm: Added.
+ (WTF::incrementFeatureCounterKey):
+ (WTF::setFeatureCounterKey):
+
</ins><span class="cx"> 2014-12-12 Anders Carlsson <andersca@apple.com>
</span><span class="cx">
</span><span class="cx"> Get rid of the DONT_FINALIZE_ON_MAIN_THREAD #define
</span></span></pre></div>
<a id="trunkSourceWTFWTFvcxprojWTFvcxproj"></a>
<div class="modfile"><h4>Modified: trunk/Source/WTF/WTF.vcxproj/WTF.vcxproj (177327 => 177328)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/WTF.vcxproj/WTF.vcxproj        2014-12-16 01:38:36 UTC (rev 177327)
+++ trunk/Source/WTF/WTF.vcxproj/WTF.vcxproj        2014-12-16 02:08:23 UTC (rev 177328)
</span><span class="lines">@@ -72,6 +72,7 @@
</span><span class="cx"> <ClCompile Include="..\wtf\dtoa\strtod.cc" />
</span><span class="cx"> <ClCompile Include="..\wtf\FastBitVector.cpp" />
</span><span class="cx"> <ClCompile Include="..\wtf\FastMalloc.cpp" />
</span><ins>+ <ClCompile Include="..\wtf\FeatureCounter.cpp" />
</ins><span class="cx"> <ClCompile Include="..\wtf\FilePrintStream.cpp" />
</span><span class="cx"> <ClCompile Include="..\wtf\FunctionDispatcher.cpp" />
</span><span class="cx"> <ClCompile Include="..\wtf\gobject\GlibUtilities.cpp">
</span><span class="lines">@@ -197,6 +198,7 @@
</span><span class="cx"> <ClInclude Include="..\wtf\dtoa\utils.h" />
</span><span class="cx"> <ClInclude Include="..\wtf\FastBitVector.h" />
</span><span class="cx"> <ClInclude Include="..\wtf\FastMalloc.h" />
</span><ins>+ <ClInclude Include="..\wtf\FeatureCounter.h" />
</ins><span class="cx"> <ClInclude Include="..\wtf\FeatureDefines.h" />
</span><span class="cx"> <ClInclude Include="..\wtf\FilePrintStream.h" />
</span><span class="cx"> <ClInclude Include="..\wtf\FlipBytes.h" />
</span><span class="lines">@@ -775,4 +777,4 @@
</span><span class="cx"> <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
</span><span class="cx"> <ImportGroup Label="ExtensionTargets">
</span><span class="cx"> </ImportGroup>
</span><del>-</Project>
</del><span class="cx">\ No newline at end of file
</span><ins>+</Project>
</ins></span></pre></div>
<a id="trunkSourceWTFWTFxcodeprojprojectpbxproj"></a>
<div class="modfile"><h4>Modified: trunk/Source/WTF/WTF.xcodeproj/project.pbxproj (177327 => 177328)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/WTF.xcodeproj/project.pbxproj        2014-12-16 01:38:36 UTC (rev 177327)
+++ trunk/Source/WTF/WTF.xcodeproj/project.pbxproj        2014-12-16 02:08:23 UTC (rev 177328)
</span><span class="lines">@@ -73,6 +73,9 @@
</span><span class="cx">                 2CDED0EF18115C38004DBA70 /* RunLoopCF.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 2CDED0EE18115C38004DBA70 /* RunLoopCF.cpp */; };
</span><span class="cx">                 2CDED0F318115C85004DBA70 /* RunLoop.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 2CDED0F118115C85004DBA70 /* RunLoop.cpp */; };
</span><span class="cx">                 2CDED0F418115C85004DBA70 /* RunLoop.h in Headers */ = {isa = PBXBuildFile; fileRef = 2CDED0F218115C85004DBA70 /* RunLoop.h */; };
</span><ins>+                463111841A3F729A00E925A3 /* FeatureCounter.h in Headers */ = {isa = PBXBuildFile; fileRef = 463111831A3F729A00E925A3 /* FeatureCounter.h */; };
+                463111861A3F72B800E925A3 /* FeatureCounter.mm in Sources */ = {isa = PBXBuildFile; fileRef = 463111851A3F72B800E925A3 /* FeatureCounter.mm */; };
+                463111881A3F899100E925A3 /* FeatureCounter.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 463111871A3F899100E925A3 /* FeatureCounter.cpp */; };
</ins><span class="cx">                 7CBBA07419BB7FDC00BBF025 /* OSObjectPtr.h in Headers */ = {isa = PBXBuildFile; fileRef = 7CBBA07319BB7FDC00BBF025 /* OSObjectPtr.h */; };
</span><span class="cx">                 7CDD7FF8186D291E007433CD /* IteratorAdaptors.h in Headers */ = {isa = PBXBuildFile; fileRef = 7CDD7FF7186D291E007433CD /* IteratorAdaptors.h */; };
</span><span class="cx">                 7CDD7FFA186D2A54007433CD /* IteratorRange.h in Headers */ = {isa = PBXBuildFile; fileRef = 7CDD7FF9186D2A54007433CD /* IteratorRange.h */; };
</span><span class="lines">@@ -361,6 +364,9 @@
</span><span class="cx">                 2CDED0EE18115C38004DBA70 /* RunLoopCF.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = RunLoopCF.cpp; sourceTree = "<group>"; };
</span><span class="cx">                 2CDED0F118115C85004DBA70 /* RunLoop.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = RunLoop.cpp; sourceTree = "<group>"; };
</span><span class="cx">                 2CDED0F218115C85004DBA70 /* RunLoop.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RunLoop.h; sourceTree = "<group>"; };
</span><ins>+                463111831A3F729A00E925A3 /* FeatureCounter.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = FeatureCounter.h; sourceTree = "<group>"; };
+                463111851A3F72B800E925A3 /* FeatureCounter.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = FeatureCounter.mm; sourceTree = "<group>"; };
+                463111871A3F899100E925A3 /* FeatureCounter.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = FeatureCounter.cpp; sourceTree = "<group>"; };
</ins><span class="cx">                 5D247B6214689B8600E78B76 /* libWTF.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libWTF.a; sourceTree = BUILT_PRODUCTS_DIR; };
</span><span class="cx">                 5D247B6E14689C4700E78B76 /* Base.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Base.xcconfig; sourceTree = "<group>"; };
</span><span class="cx">                 5D247B7014689C4700E78B76 /* DebugRelease.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = DebugRelease.xcconfig; sourceTree = "<group>"; };
</span><span class="lines">@@ -616,6 +622,7 @@
</span><span class="cx">                 1FA47C87152502DA00568D1B /* ios */ = {
</span><span class="cx">                         isa = PBXGroup;
</span><span class="cx">                         children = (
</span><ins>+                                463111851A3F72B800E925A3 /* FeatureCounter.mm */,
</ins><span class="cx">                                 1FA47C88152502DA00568D1B /* WebCoreThread.cpp */,
</span><span class="cx">                                 1FA47C89152502DA00568D1B /* WebCoreThread.h */,
</span><span class="cx">                         );
</span><span class="lines">@@ -754,6 +761,8 @@
</span><span class="cx">                                 0FD81AC4154FB22E00983E72 /* FastBitVector.h */,
</span><span class="cx">                                 A8A472A1151A825A004123FF /* FastMalloc.cpp */,
</span><span class="cx">                                 A8A472A2151A825A004123FF /* FastMalloc.h */,
</span><ins>+                                463111871A3F899100E925A3 /* FeatureCounter.cpp */,
+                                463111831A3F729A00E925A3 /* FeatureCounter.h */,
</ins><span class="cx">                                 B38FD7BC168953E80065C969 /* FeatureDefines.h */,
</span><span class="cx">                                 0F9D335B165DBA73005AD387 /* FilePrintStream.cpp */,
</span><span class="cx">                                 0F9D335C165DBA73005AD387 /* FilePrintStream.h */,
</span><span class="lines">@@ -1178,6 +1187,7 @@
</span><span class="cx">                                 1AFDE648195201C300C48FFA /* TypeCastsCF.h in Headers */,
</span><span class="cx">                                 A8A47423151A825B004123FF /* SimpleStats.h in Headers */,
</span><span class="cx">                                 A8A47424151A825B004123FF /* SinglyLinkedList.h in Headers */,
</span><ins>+                                463111841A3F729A00E925A3 /* FeatureCounter.h in Headers */,
</ins><span class="cx">                                 A748745317A0BDAE00FA04CB /* SixCharacterHash.h in Headers */,
</span><span class="cx">                                 A8A47426151A825B004123FF /* Spectrum.h in Headers */,
</span><span class="cx">                                 A8A47428151A825B004123FF /* StackBounds.h in Headers */,
</span><span class="lines">@@ -1345,6 +1355,7 @@
</span><span class="cx">                                 86F46F601A2840EE00CCBF22 /* RefCounter.cpp in Sources */,
</span><span class="cx">                                 A8A4739E151A825B004123FF /* DataLog.cpp in Sources */,
</span><span class="cx">                                 A8A473A0151A825B004123FF /* DateMath.cpp in Sources */,
</span><ins>+                                463111861A3F72B800E925A3 /* FeatureCounter.mm in Sources */,
</ins><span class="cx">                                 A8A473A2151A825B004123FF /* DecimalNumber.cpp in Sources */,
</span><span class="cx">                                 A8A473AE151A825B004123FF /* diy-fp.cc in Sources */,
</span><span class="cx">                                 A8A473B0151A825B004123FF /* double-conversion.cc in Sources */,
</span><span class="lines">@@ -1365,6 +1376,7 @@
</span><span class="cx">                                 CD5497AC15857D0300B5BC30 /* MediaTime.cpp in Sources */,
</span><span class="cx">                                 A8A473EC151A825B004123FF /* MetaAllocator.cpp in Sources */,
</span><span class="cx">                                 A8A473F4151A825B004123FF /* NumberOfCores.cpp in Sources */,
</span><ins>+                                463111881A3F899100E925A3 /* FeatureCounter.cpp in Sources */,
</ins><span class="cx">                                 A8A473F7151A825B004123FF /* OSAllocatorPosix.cpp in Sources */,
</span><span class="cx">                                 93F1993E19D7958D00C2390B /* StringView.cpp in Sources */,
</span><span class="cx">                                 A8A473F9151A825B004123FF /* OSRandomSource.cpp in Sources */,
</span></span></pre></div>
<a id="trunkSourceWTFwtfCMakeListstxt"></a>
<div class="modfile"><h4>Modified: trunk/Source/WTF/wtf/CMakeLists.txt (177327 => 177328)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/wtf/CMakeLists.txt        2014-12-16 01:38:36 UTC (rev 177327)
+++ trunk/Source/WTF/wtf/CMakeLists.txt        2014-12-16 02:08:23 UTC (rev 177328)
</span><span class="lines">@@ -24,6 +24,7 @@
</span><span class="cx"> DisallowCType.h
</span><span class="cx"> DoublyLinkedList.h
</span><span class="cx"> FastMalloc.h
</span><ins>+ FeatureCounter.h
</ins><span class="cx"> FeatureDefines.h
</span><span class="cx"> FilePrintStream.h
</span><span class="cx"> FlipBytes.h
</span><span class="lines">@@ -159,6 +160,7 @@
</span><span class="cx"> DecimalNumber.cpp
</span><span class="cx"> FastBitVector.cpp
</span><span class="cx"> FastMalloc.cpp
</span><ins>+ FeatureCounter.cpp
</ins><span class="cx"> FilePrintStream.cpp
</span><span class="cx"> FunctionDispatcher.cpp
</span><span class="cx"> GregorianDateTime.cpp
</span></span></pre></div>
<a id="trunkSourceWTFwtfFeatureCountercpp"></a>
<div class="addfile"><h4>Added: trunk/Source/WTF/wtf/FeatureCounter.cpp (0 => 177328)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/wtf/FeatureCounter.cpp         (rev 0)
+++ trunk/Source/WTF/wtf/FeatureCounter.cpp        2014-12-16 02:08:23 UTC (rev 177328)
</span><span class="lines">@@ -0,0 +1,46 @@
</span><ins>+/*
+ * Copyright (C) 2014 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "FeatureCounter.h"
+
+namespace WTF {
+
+#if !PLATFORM(IOS)
+
+void incrementFeatureCounterKey(const char* const key)
+{
+ UNUSED_PARAM(key);
+}
+
+void setFeatureCounterKey(const char* const key, int64_t value)
+{
+ UNUSED_PARAM(key);
+ UNUSED_PARAM(value);
+}
+
+#endif
+
+} // namespace WTF
</ins></span></pre></div>
<a id="trunkSourceWTFwtfFeatureCounterh"></a>
<div class="addfile"><h4>Added: trunk/Source/WTF/wtf/FeatureCounter.h (0 => 177328)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/wtf/FeatureCounter.h         (rev 0)
+++ trunk/Source/WTF/wtf/FeatureCounter.h        2014-12-16 02:08:23 UTC (rev 177328)
</span><span class="lines">@@ -0,0 +1,39 @@
</span><ins>+/*
+ * Copyright (C) 2014 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef FeatureCounter_h
+#define FeatureCounter_h
+
+namespace WTF {
+
+WTF_EXPORT_PRIVATE void incrementFeatureCounterKey(const char* const key);
+WTF_EXPORT_PRIVATE void setFeatureCounterKey(const char* const key, int64_t value);
+
+#define FEATURE_COUNTER_INCREMENT_KEY(key) WTF::incrementFeatureCounterKey(key)
+#define FEATURE_COUNTER_SET_KEY(key, value) WTF::setFeatureCounterKey(key, value)
+
+} // namespace WTF
+
+#endif // FeatureCounter_h
</ins></span></pre></div>
<a id="trunkSourceWTFwtfiosFeatureCountermm"></a>
<div class="addfile"><h4>Added: trunk/Source/WTF/wtf/ios/FeatureCounter.mm (0 => 177328)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/wtf/ios/FeatureCounter.mm         (rev 0)
+++ trunk/Source/WTF/wtf/ios/FeatureCounter.mm        2014-12-16 02:08:23 UTC (rev 177328)
</span><span class="lines">@@ -0,0 +1,48 @@
</span><ins>+/*
+ * Copyright (C) 2014 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import "config.h"
+#import "FeatureCounter.h"
+
+#if PLATFORM(IOS)
+#import <AppSupport/CPAggregateDictionary.h>
+
+namespace WTF {
+
+void incrementFeatureCounterKey(const char* const key)
+{
+ NSString *nsKey = [[NSString alloc] initWithCharactersNoCopy:reinterpret_cast<unichar*>(const_cast<char*>(key)) length:strlen(key) freeWhenDone:NO];
+ [[CPAggregateDictionary sharedAggregateDictionary] incrementKey:nsKey];
+}
+
+void setFeatureCounterKey(const char* const key, int64_t value)
+{
+ NSString *nsKey = [[NSString alloc] initWithCharactersNoCopy:reinterpret_cast<unichar*>(const_cast<char*>(key)) length:strlen(key) freeWhenDone:NO];
+ [[CPAggregateDictionary sharedAggregateDictionary] setValue:value forScalarKey:nsKey];
+}
+
+} // namespace WTF
+
+#endif // PLATFORM(IOS)
</ins></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (177327 => 177328)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2014-12-16 01:38:36 UTC (rev 177327)
+++ trunk/Source/WebCore/ChangeLog        2014-12-16 02:08:23 UTC (rev 177328)
</span><span class="lines">@@ -1,3 +1,22 @@
</span><ins>+2014-12-15 Chris Dumez <cdumez@apple.com>
+
+ [iOS] Add feature counting support
+ https://bugs.webkit.org/show_bug.cgi?id=139652
+ <rdar://problem/19255690>
+
+ Reviewed by Gavin Barraclough.
+
+ Use FeatureCounter API to log PageCache failure reasons
+ as well as its success rate.
+
+ No new tests, no behavior change.
+
+ * history/PageCache.cpp:
+ (WebCore::logCanCacheFrameDecision):
+ (WebCore::logCanCachePageDecision):
+ (WebCore::PageCache::canCache):
+ * platform/FeatureCounterKeys.h: Added.
+
</ins><span class="cx"> 2014-12-15 Beth Dakin <bdakin@apple.com>
</span><span class="cx">
</span><span class="cx"> Speculative build fix.
</span></span></pre></div>
<a id="trunkSourceWebCorehistoryPageCachecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/history/PageCache.cpp (177327 => 177328)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/history/PageCache.cpp        2014-12-16 01:38:36 UTC (rev 177327)
+++ trunk/Source/WebCore/history/PageCache.cpp        2014-12-16 02:08:23 UTC (rev 177328)
</span><span class="lines">@@ -1,5 +1,5 @@
</span><span class="cx"> /*
</span><del>- * Copyright (C) 2007 Apple Inc. All rights reserved.
</del><ins>+ * Copyright (C) 2007, 2014 Apple Inc. All rights reserved.
</ins><span class="cx"> *
</span><span class="cx"> * Redistribution and use in source and binary forms, with or without
</span><span class="cx"> * modification, are permitted provided that the following conditions
</span><span class="lines">@@ -36,6 +36,7 @@
</span><span class="cx"> #include "DeviceOrientationController.h"
</span><span class="cx"> #include "Document.h"
</span><span class="cx"> #include "DocumentLoader.h"
</span><ins>+#include "FeatureCounterKeys.h"
</ins><span class="cx"> #include "FrameLoader.h"
</span><span class="cx"> #include "FrameLoaderClient.h"
</span><span class="cx"> #include "FrameLoaderStateMachine.h"
</span><span class="lines">@@ -66,6 +67,12 @@
</span><span class="cx"> #if !defined(NDEBUG)
</span><span class="cx">
</span><span class="cx"> #define PCLOG(...) LOG(PageCache, "%*s%s", indentLevel*4, "", makeString(__VA_ARGS__).utf8().data())
</span><ins>+
+#else
+
+#define PCLOG(...) ((void)0)
+
+#endif // !defined(NDEBUG)
</ins><span class="cx">
</span><span class="cx"> // Used in histograms, please only add at the end, and do not remove elements (renaming e.g. to "FooEnumUnused1" is fine).
</span><span class="cx"> // This is because statistics may be gathered from histograms between versions over time, and re-using values causes collisions.
</span><span class="lines">@@ -93,6 +100,7 @@
</span><span class="cx"> PCLOG("+---");
</span><span class="cx"> if (!frame->loader().documentLoader()) {
</span><span class="cx"> PCLOG(" -There is no DocumentLoader object");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureNoDocumentLoaderKey);
</ins><span class="cx"> return 1 << NoDocumentLoader;
</span><span class="cx"> }
</span><span class="cx">
</span><span class="lines">@@ -106,6 +114,7 @@
</span><span class="cx"> unsigned rejectReasons = 0;
</span><span class="cx"> if (!frame->loader().documentLoader()->mainDocumentError().isNull()) {
</span><span class="cx"> PCLOG(" -Main document has an error");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureMainDocumentErrorKey);
</ins><span class="cx"> #if !PLATFORM(IOS)
</span><span class="cx"> rejectReasons |= 1 << MainDocumentError;
</span><span class="cx"> #else
</span><span class="lines">@@ -117,56 +126,71 @@
</span><span class="cx"> }
</span><span class="cx"> if (frame->loader().documentLoader()->substituteData().isValid() && frame->loader().documentLoader()->substituteData().failingURL().isEmpty()) {
</span><span class="cx"> PCLOG(" -Frame is an error page");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureIsErrorPageKey);
</ins><span class="cx"> rejectReasons |= 1 << IsErrorPage;
</span><span class="cx"> }
</span><span class="cx"> if (frame->loader().subframeLoader().containsPlugins() && !frame->page()->settings().pageCacheSupportsPlugins()) {
</span><span class="cx"> PCLOG(" -Frame contains plugins");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureHasPlugins);
</ins><span class="cx"> rejectReasons |= 1 << HasPlugins;
</span><span class="cx"> }
</span><span class="cx"> if (frame->document()->url().protocolIs("https")
</span><span class="cx"> && (frame->loader().documentLoader()->response().cacheControlContainsNoCache()
</span><span class="cx"> || frame->loader().documentLoader()->response().cacheControlContainsNoStore())) {
</span><ins>+ if (frame->loader().documentLoader()->response().cacheControlContainsNoCache())
+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureHTTPSNoCacheKey);
+ if (frame->loader().documentLoader()->response().cacheControlContainsNoStore())
+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureHTTPSNoStoreKey);
</ins><span class="cx"> PCLOG(" -Frame is HTTPS, and cache control prohibits caching or storing");
</span><span class="cx"> rejectReasons |= 1 << IsHttpsAndCacheControlled;
</span><span class="cx"> }
</span><span class="cx"> #if ENABLE(SQL_DATABASE)
</span><span class="cx"> if (DatabaseManager::manager().hasOpenDatabases(frame->document())) {
</span><span class="cx"> PCLOG(" -Frame has open database handles");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureHasOpenDatabasesKey);
</ins><span class="cx"> rejectReasons |= 1 << HasDatabaseHandles;
</span><span class="cx"> }
</span><span class="cx"> #endif
</span><span class="cx"> #if ENABLE(SHARED_WORKERS)
</span><span class="cx"> if (SharedWorkerRepository::hasSharedWorkers(frame->document())) {
</span><span class="cx"> PCLOG(" -Frame has associated SharedWorkers");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureHasSharedWorkersKey);
</ins><span class="cx"> rejectReasons |= 1 << HasSharedWorkers;
</span><span class="cx"> }
</span><span class="cx"> #endif
</span><span class="cx"> if (!frame->loader().history().currentItem()) {
</span><span class="cx"> PCLOG(" -No current history item");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureNoCurrentHistoryItemKey);
</ins><span class="cx"> rejectReasons |= 1 << NoHistoryItem;
</span><span class="cx"> }
</span><span class="cx"> if (frame->loader().quickRedirectComing()) {
</span><span class="cx"> PCLOG(" -Quick redirect is coming");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureQuirkRedirectComingKey);
</ins><span class="cx"> rejectReasons |= 1 << QuickRedirectComing;
</span><span class="cx"> }
</span><span class="cx"> if (frame->loader().documentLoader()->isLoadingInAPISense()) {
</span><span class="cx"> PCLOG(" -DocumentLoader is still loading in API sense");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureLoadingAPISenseKey);
</ins><span class="cx"> rejectReasons |= 1 << IsLoadingInAPISense;
</span><span class="cx"> }
</span><span class="cx"> if (frame->loader().documentLoader()->isStopping()) {
</span><span class="cx"> PCLOG(" -DocumentLoader is in the middle of stopping");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureDocumentLoaderStoppingKey);
</ins><span class="cx"> rejectReasons |= 1 << IsStopping;
</span><span class="cx"> }
</span><span class="cx"> if (!frame->document()->canSuspendActiveDOMObjects()) {
</span><del>- PCLOG(" -The document cannot suspect its active DOM Objects");
</del><ins>+ PCLOG(" -The document cannot suspend its active DOM Objects");
+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureCannotSuspendActiveDOMObjectsKey);
</ins><span class="cx"> rejectReasons |= 1 << CannotSuspendActiveDOMObjects;
</span><span class="cx"> }
</span><span class="cx"> if (!frame->loader().documentLoader()->applicationCacheHost()->canCacheInPageCache()) {
</span><span class="cx"> PCLOG(" -The DocumentLoader uses an application cache");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureApplicationCacheKey);
</ins><span class="cx"> rejectReasons |= 1 << DocumentLoaderUsesApplicationCache;
</span><span class="cx"> }
</span><span class="cx"> if (!frame->loader().client().canCachePage()) {
</span><span class="cx"> PCLOG(" -The client says this frame cannot be cached");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureDeniedByClientKey);
</ins><span class="cx"> rejectReasons |= 1 << ClientDeniesCaching;
</span><span class="cx"> }
</span><span class="cx">
</span><span class="lines">@@ -218,38 +242,48 @@
</span><span class="cx"> #if ENABLE(DEVICE_ORIENTATION) && !PLATFORM(IOS)
</span><span class="cx"> if (DeviceMotionController::isActiveAt(page)) {
</span><span class="cx"> PCLOG(" -Page is using DeviceMotion");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureDeviceMotionKey);
</ins><span class="cx"> rejectReasons |= 1 << UsesDeviceMotion;
</span><span class="cx"> }
</span><span class="cx"> if (DeviceOrientationController::isActiveAt(page)) {
</span><span class="cx"> PCLOG(" -Page is using DeviceOrientation");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureDeviceOrientationKey);
</ins><span class="cx"> rejectReasons |= 1 << UsesDeviceOrientation;
</span><span class="cx"> }
</span><span class="cx"> #endif
</span><span class="cx"> #if ENABLE(PROXIMITY_EVENTS)
</span><span class="cx"> if (DeviceProximityController::isActiveAt(page)) {
</span><span class="cx"> PCLOG(" -Page is using DeviceProximity");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureDeviceProximityKey);
</ins><span class="cx"> rejectReasons |= 1 << UsesDeviceMotion;
</span><span class="cx"> }
</span><span class="cx"> #endif
</span><span class="cx"> FrameLoadType loadType = page->mainFrame().loader().loadType();
</span><span class="cx"> if (loadType == FrameLoadType::Reload) {
</span><span class="cx"> PCLOG(" -Load type is: Reload");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureReloadKey);
</ins><span class="cx"> rejectReasons |= 1 << IsReload;
</span><span class="cx"> }
</span><span class="cx"> if (loadType == FrameLoadType::ReloadFromOrigin) {
</span><span class="cx"> PCLOG(" -Load type is: Reload from origin");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureReloadFromOriginKey);
</ins><span class="cx"> rejectReasons |= 1 << IsReloadFromOrigin;
</span><span class="cx"> }
</span><span class="cx"> if (loadType == FrameLoadType::Same) {
</span><span class="cx"> PCLOG(" -Load type is: Same");
</span><ins>+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureSameLoadKey);
</ins><span class="cx"> rejectReasons |= 1 << IsSameLoad;
</span><span class="cx"> }
</span><span class="cx">
</span><del>- PCLOG(rejectReasons ? " Page CANNOT be cached\n--------" : " Page CAN be cached\n--------");
</del><ins>+ if (rejectReasons) {
+ PCLOG(" Page CANNOT be cached\n--------");
+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheFailureKey);
+ } else {
+ PCLOG(" Page CAN be cached\n--------");
+ FEATURE_COUNTER_INCREMENT_KEY(FeatureCounterPageCacheSuccessKey);
+ }
</ins><span class="cx"> }
</span><span class="cx">
</span><del>-#endif // !defined(NDEBUG)
-
</del><span class="cx"> PageCache* pageCache()
</span><span class="cx"> {
</span><span class="cx"> static PageCache* staticPageCache = new PageCache;
</span><span class="lines">@@ -308,9 +342,7 @@
</span><span class="cx"> if (!page)
</span><span class="cx"> return false;
</span><span class="cx">
</span><del>-#if !defined(NDEBUG)
</del><span class="cx"> logCanCachePageDecision(page);
</span><del>-#endif
</del><span class="cx">
</span><span class="cx"> if (memoryPressureHandler().isUnderMemoryPressure())
</span><span class="cx"> return false;
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformFeatureCounterKeysh"></a>
<div class="addfile"><h4>Added: trunk/Source/WebCore/platform/FeatureCounterKeys.h (0 => 177328)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/FeatureCounterKeys.h         (rev 0)
+++ trunk/Source/WebCore/platform/FeatureCounterKeys.h        2014-12-16 02:08:23 UTC (rev 177328)
</span><span class="lines">@@ -0,0 +1,69 @@
</span><ins>+/*
+ * Copyright (C) 2014 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef FeatureCounterKeys_h
+#define FeatureCounterKeys_h
+
+#include <wtf/FeatureCounter.h>
+
+namespace WebCore {
+
+// Page cache.
+static const char FeatureCounterPageCacheFailureNoDocumentLoaderKey[] = "com.apple.WebKit.pageCache.failure.noDocumentLoader";
+static const char FeatureCounterPageCacheFailureMainDocumentErrorKey[] = "com.apple.WebKit.pageCache.failure.mainDocumentError";
+static const char FeatureCounterPageCacheFailureIsErrorPageKey[] = "com.apple.WebKit.pageCache.failure.isErrorPage";
+static const char FeatureCounterPageCacheFailureHasPlugins[] = "com.apple.WebKit.pageCache.failure.hasPlugins";
+static const char FeatureCounterPageCacheFailureHTTPSNoCacheKey[] = "com.apple.WebKit.pageCache.failure.httpsNoCache";
+static const char FeatureCounterPageCacheFailureHTTPSNoStoreKey[] = "com.apple.WebKit.pageCache.failure.httpsNoStore";
+#if ENABLE(SQL_DATABASE)
+static const char FeatureCounterPageCacheFailureHasOpenDatabasesKey[] = "com.apple.WebKit.pageCache.failure.hasOpenDatabases";
+#endif
+#if ENABLE(SHARED_WORKERS)
+static const char FeatureCounterPageCacheFailureHasSharedWorkersKey[] = "com.apple.WebKit.pageCache.failure.hasSharedWorkers";
+#endif
+static const char FeatureCounterPageCacheFailureNoCurrentHistoryItemKey[] = "com.apple.WebKit.pageCache.failure.noCurrentHistoryItem";
+static const char FeatureCounterPageCacheFailureQuirkRedirectComingKey[] = "com.apple.WebKit.pageCache.failure.quirkRedirectComing";
+static const char FeatureCounterPageCacheFailureLoadingAPISenseKey[] = "com.apple.WebKit.pageCache.failure.loadingAPISense";
+static const char FeatureCounterPageCacheFailureDocumentLoaderStoppingKey[] = "com.apple.WebKit.pageCache.failure.documentLoaderStopping";
+static const char FeatureCounterPageCacheFailureCannotSuspendActiveDOMObjectsKey[] = "com.apple.WebKit.pageCache.failure.cannotSuspendActiveDOMObjects";
+static const char FeatureCounterPageCacheFailureApplicationCacheKey[] = "com.apple.WebKit.pageCache.failure.applicationCache";
+static const char FeatureCounterPageCacheFailureDeniedByClientKey[] = "com.apple.WebKit.pageCache.failure.deniedByClient";
+#if ENABLE(DEVICE_ORIENTATION)
+static const char FeatureCounterPageCacheFailureDeviceMotionKey[] = "com.apple.WebKit.pageCache.failure.deviceMotion";
+static const char FeatureCounterPageCacheFailureDeviceOrientationKey[] = "com.apple.WebKit.pageCache.failure.deviceOrientation";
+#endif
+#if ENABLE(PROXIMITY_EVENTS)
+static const char FeatureCounterPageCacheFailureDeviceProximityKey[] = "com.apple.WebKit.pageCache.failure.deviceProximity";
+#endif
+static const char FeatureCounterPageCacheFailureReloadKey[] = "com.apple.WebKit.pageCache.failure.reload";
+static const char FeatureCounterPageCacheFailureReloadFromOriginKey[] = "com.apple.WebKit.pageCache.failure.reloadFromOrigin";
+static const char FeatureCounterPageCacheFailureSameLoadKey[] = "com.apple.WebKit.pageCache.failure.sameLoad";
+static const char FeatureCounterPageCacheFailureKey[] = "com.apple.WebKit.pageCache.failure";
+static const char FeatureCounterPageCacheSuccessKey[] = "com.apple.WebKit.pageCache.success";
+
+} // namespace WebCore
+
+#endif // FeatureCounterKeys_h
+
</ins></span></pre>
</div>
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