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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/169123">169123</a></dd>
<dt>Author</dt> <dd>simon.fraser@apple.com</dd>
<dt>Date</dt> <dd>2014-05-20 12:13:14 -0700 (Tue, 20 May 2014)</dd>
</dl>

<h3>Log Message</h3>
<pre>REGRESSION (<a href="http://trac.webkit.org/projects/webkit/changeset/169063">r169063</a>) Fixed and sticky nodes misplaced on scrolling sometimes
https://bugs.webkit.org/show_bug.cgi?id=133106
&lt;rdar://problem/16967648&gt;

Reviewed by Sam Weinig.

Fix regression from <a href="http://trac.webkit.org/projects/webkit/changeset/169063">r169063</a>. That commit removed scrolledContentsLayers from
frame scrolling nodes, but they do actually use them.

So put them back; not in the base class, because they have a somewhat different
meaning for overflow scrolling and frame scrolling.

Source/WebCore:
* WebCore.exp.in:
* page/scrolling/AsyncScrollingCoordinator.cpp:
(WebCore::AsyncScrollingCoordinator::frameViewRootLayerDidChange):
(WebCore::AsyncScrollingCoordinator::updateFrameScrollingNode):
* page/scrolling/AsyncScrollingCoordinator.h:
* page/scrolling/ScrollingCoordinator.h:
(WebCore::ScrollingCoordinator::updateFrameScrollingNode):
* page/scrolling/ScrollingStateFrameScrollingNode.cpp:
(WebCore::ScrollingStateFrameScrollingNode::ScrollingStateFrameScrollingNode):
(WebCore::ScrollingStateFrameScrollingNode::setScrolledContentsLayer):
* page/scrolling/ScrollingStateFrameScrollingNode.h:
* page/scrolling/mac/ScrollingTreeFrameScrollingNodeMac.mm:
(WebCore::ScrollingTreeFrameScrollingNodeMac::updateBeforeChildren):
* rendering/RenderLayerCompositor.cpp:
(WebCore::RenderLayerCompositor::updateScrollCoordinatedLayer):

Source/WebKit2:
* Shared/Scrolling/RemoteScrollingCoordinatorTransaction.cpp:
(ArgumentCoder&lt;ScrollingStateFrameScrollingNode&gt;::encode):
(ArgumentCoder&lt;ScrollingStateFrameScrollingNode&gt;::decode):
(WebKit::RemoteScrollingTreeTextStream::dump):
* UIProcess/Scrolling/RemoteScrollingCoordinatorProxy.cpp:
(WebKit::RemoteScrollingCoordinatorProxy::connectStateNodeLayers):</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreWebCoreexpin">trunk/Source/WebCore/WebCore.exp.in</a></li>
<li><a href="#trunkSourceWebCorepagescrollingAsyncScrollingCoordinatorcpp">trunk/Source/WebCore/page/scrolling/AsyncScrollingCoordinator.cpp</a></li>
<li><a href="#trunkSourceWebCorepagescrollingAsyncScrollingCoordinatorh">trunk/Source/WebCore/page/scrolling/AsyncScrollingCoordinator.h</a></li>
<li><a href="#trunkSourceWebCorepagescrollingScrollingCoordinatorh">trunk/Source/WebCore/page/scrolling/ScrollingCoordinator.h</a></li>
<li><a href="#trunkSourceWebCorepagescrollingScrollingStateFrameScrollingNodecpp">trunk/Source/WebCore/page/scrolling/ScrollingStateFrameScrollingNode.cpp</a></li>
<li><a href="#trunkSourceWebCorepagescrollingScrollingStateFrameScrollingNodeh">trunk/Source/WebCore/page/scrolling/ScrollingStateFrameScrollingNode.h</a></li>
<li><a href="#trunkSourceWebCorepagescrollingmacScrollingTreeFrameScrollingNodeMacmm">trunk/Source/WebCore/page/scrolling/mac/ScrollingTreeFrameScrollingNodeMac.mm</a></li>
<li><a href="#trunkSourceWebCorerenderingRenderLayerCompositorcpp">trunk/Source/WebCore/rendering/RenderLayerCompositor.cpp</a></li>
<li><a href="#trunkSourceWebKit2ChangeLog">trunk/Source/WebKit2/ChangeLog</a></li>
<li><a href="#trunkSourceWebKit2SharedScrollingRemoteScrollingCoordinatorTransactioncpp">trunk/Source/WebKit2/Shared/Scrolling/RemoteScrollingCoordinatorTransaction.cpp</a></li>
<li><a href="#trunkSourceWebKit2UIProcessScrollingRemoteScrollingCoordinatorProxycpp">trunk/Source/WebKit2/UIProcess/Scrolling/RemoteScrollingCoordinatorProxy.cpp</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (169122 => 169123)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2014-05-20 18:44:52 UTC (rev 169122)
+++ trunk/Source/WebCore/ChangeLog        2014-05-20 19:13:14 UTC (rev 169123)
</span><span class="lines">@@ -1,3 +1,33 @@
</span><ins>+2014-05-19  Simon Fraser  &lt;simon.fraser@apple.com&gt;
+
+        REGRESSION (r169063) Fixed and sticky nodes misplaced on scrolling sometimes
+        https://bugs.webkit.org/show_bug.cgi?id=133106
+        &lt;rdar://problem/16967648&gt;
+
+        Reviewed by Sam Weinig.
+
+        Fix regression from r169063. That commit removed scrolledContentsLayers from 
+        frame scrolling nodes, but they do actually use them.
+        
+        So put them back; not in the base class, because they have a somewhat different
+        meaning for overflow scrolling and frame scrolling.
+
+        * WebCore.exp.in:
+        * page/scrolling/AsyncScrollingCoordinator.cpp:
+        (WebCore::AsyncScrollingCoordinator::frameViewRootLayerDidChange):
+        (WebCore::AsyncScrollingCoordinator::updateFrameScrollingNode):
+        * page/scrolling/AsyncScrollingCoordinator.h:
+        * page/scrolling/ScrollingCoordinator.h:
+        (WebCore::ScrollingCoordinator::updateFrameScrollingNode):
+        * page/scrolling/ScrollingStateFrameScrollingNode.cpp:
+        (WebCore::ScrollingStateFrameScrollingNode::ScrollingStateFrameScrollingNode):
+        (WebCore::ScrollingStateFrameScrollingNode::setScrolledContentsLayer):
+        * page/scrolling/ScrollingStateFrameScrollingNode.h:
+        * page/scrolling/mac/ScrollingTreeFrameScrollingNodeMac.mm:
+        (WebCore::ScrollingTreeFrameScrollingNodeMac::updateBeforeChildren):
+        * rendering/RenderLayerCompositor.cpp:
+        (WebCore::RenderLayerCompositor::updateScrollCoordinatedLayer):
+
</ins><span class="cx"> 2014-05-20  Radu Stavila  &lt;stavila@adobe.com&gt;
</span><span class="cx"> 
</span><span class="cx">         REGRESSION: [CSS Regions] Content flowed directly into the flow thread that ends up in the second region is not properly repainted
</span></span></pre></div>
<a id="trunkSourceWebCoreWebCoreexpin"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/WebCore.exp.in (169122 => 169123)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/WebCore.exp.in        2014-05-20 18:44:52 UTC (rev 169122)
+++ trunk/Source/WebCore/WebCore.exp.in        2014-05-20 19:13:14 UTC (rev 169123)
</span><span class="lines">@@ -826,8 +826,8 @@
</span><span class="cx"> __ZN7WebCore19toInt32EnforceRangeEPN3JSC9ExecStateENS0_7JSValueE
</span><span class="cx"> __ZN7WebCore20ApplicationCacheHost17maybeLoadResourceEPNS_14ResourceLoaderERKNS_15ResourceRequestERKNS_3URLE
</span><span class="cx"> __ZN7WebCore20ApplicationCacheHost25maybeLoadFallbackForErrorEPNS_14ResourceLoaderERKNS_13ResourceErrorE
</span><ins>+__ZN7WebCore20ApplicationCacheHost28maybeLoadFallbackForRedirectEPNS_14ResourceLoaderERNS_15ResourceRequestERKNS_16ResourceResponseE
</ins><span class="cx"> __ZN7WebCore20ApplicationCacheHost28maybeLoadFallbackForResponseEPNS_14ResourceLoaderERKNS_16ResourceResponseE
</span><del>-__ZN7WebCore20ApplicationCacheHost28maybeLoadFallbackForRedirectEPNS_14ResourceLoaderERNS_15ResourceRequestERKNS_16ResourceResponseE
</del><span class="cx"> __ZN7WebCore20CachedResourceLoader31garbageCollectDocumentResourcesEv
</span><span class="cx"> __ZN7WebCore20DictationAlternativeC1Ejjy
</span><span class="cx"> __ZN7WebCore20DictationAlternativeC1Ev
</span><span class="lines">@@ -2815,7 +2815,7 @@
</span><span class="cx"> __ZN7WebCore25AsyncScrollingCoordinator18syncChildPositionsERKNS_10LayoutRectE
</span><span class="cx"> __ZN7WebCore25AsyncScrollingCoordinator19detachFromStateTreeEy
</span><span class="cx"> __ZN7WebCore25AsyncScrollingCoordinator22frameViewLayoutUpdatedEPNS_9FrameViewE
</span><del>-__ZN7WebCore25AsyncScrollingCoordinator24updateFrameScrollingNodeEyPNS_13GraphicsLayerES2_S2_PKNS_20ScrollingCoordinator17ScrollingGeometryE
</del><ins>+__ZN7WebCore25AsyncScrollingCoordinator24updateFrameScrollingNodeEyPNS_13GraphicsLayerES2_S2_S2_PKNS_20ScrollingCoordinator17ScrollingGeometryE
</ins><span class="cx"> __ZN7WebCore25AsyncScrollingCoordinator27frameViewRootLayerDidChangeEPNS_9FrameViewE
</span><span class="cx"> __ZN7WebCore25AsyncScrollingCoordinator27requestScrollPositionUpdateEPNS_9FrameViewERKNS_8IntPointE
</span><span class="cx"> __ZN7WebCore25AsyncScrollingCoordinator27updateOverflowScrollingNodeEyPNS_13GraphicsLayerES2_PKNS_20ScrollingCoordinator17ScrollingGeometryE
</span><span class="lines">@@ -2846,6 +2846,7 @@
</span><span class="cx"> __ZN7WebCore32ScrollingStateFrameScrollingNode19setFrameScaleFactorEf
</span><span class="cx"> __ZN7WebCore32ScrollingStateFrameScrollingNode21setContentShadowLayerERKNS_19LayerRepresentationE
</span><span class="cx"> __ZN7WebCore32ScrollingStateFrameScrollingNode24setCounterScrollingLayerERKNS_19LayerRepresentationE
</span><ins>+__ZN7WebCore32ScrollingStateFrameScrollingNode24setScrolledContentsLayerERKNS_19LayerRepresentationE
</ins><span class="cx"> __ZN7WebCore32ScrollingStateFrameScrollingNode25setWheelEventHandlerCountEj
</span><span class="cx"> __ZN7WebCore32ScrollingStateFrameScrollingNode26setNonFastScrollableRegionERKNS_6RegionE
</span><span class="cx"> __ZN7WebCore32ScrollingStateFrameScrollingNode30setSynchronousScrollingReasonsEj
</span></span></pre></div>
<a id="trunkSourceWebCorepagescrollingAsyncScrollingCoordinatorcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/scrolling/AsyncScrollingCoordinator.cpp (169122 => 169123)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/scrolling/AsyncScrollingCoordinator.cpp        2014-05-20 18:44:52 UTC (rev 169122)
+++ trunk/Source/WebCore/page/scrolling/AsyncScrollingCoordinator.cpp        2014-05-20 19:13:14 UTC (rev 169123)
</span><span class="lines">@@ -134,6 +134,7 @@
</span><span class="cx"> 
</span><span class="cx">     ScrollingStateFrameScrollingNode* node = toScrollingStateFrameScrollingNode(m_scrollingStateTree-&gt;stateNodeForID(frameView-&gt;scrollLayerID()));
</span><span class="cx">     node-&gt;setLayer(scrollLayerForFrameView(frameView));
</span><ins>+    node-&gt;setScrolledContentsLayer(rootContentLayerForFrameView(frameView));
</ins><span class="cx">     node-&gt;setCounterScrollingLayer(counterScrollingLayerForFrameView(frameView));
</span><span class="cx">     node-&gt;setInsetClipLayer(insetClipLayerForFrameView(frameView));
</span><span class="cx">     node-&gt;setContentShadowLayer(contentShadowLayerForFrameView(frameView));
</span><span class="lines">@@ -328,7 +329,7 @@
</span><span class="cx">     attachToStateTree(FrameScrollingNode, frameView-&gt;scrollLayerID(), 0);
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-void AsyncScrollingCoordinator::updateFrameScrollingNode(ScrollingNodeID nodeID, GraphicsLayer* layer, GraphicsLayer* counterScrollingLayer, GraphicsLayer* insetClipLayer, const ScrollingGeometry* scrollingGeometry)
</del><ins>+void AsyncScrollingCoordinator::updateFrameScrollingNode(ScrollingNodeID nodeID, GraphicsLayer* layer, GraphicsLayer* scrolledContentsLayer, GraphicsLayer* counterScrollingLayer, GraphicsLayer* insetClipLayer, const ScrollingGeometry* scrollingGeometry)
</ins><span class="cx"> {
</span><span class="cx">     ScrollingStateFrameScrollingNode* node = toScrollingStateFrameScrollingNode(m_scrollingStateTree-&gt;stateNodeForID(nodeID));
</span><span class="cx">     ASSERT(node);
</span><span class="lines">@@ -337,6 +338,7 @@
</span><span class="cx"> 
</span><span class="cx">     node-&gt;setLayer(layer);
</span><span class="cx">     node-&gt;setInsetClipLayer(insetClipLayer);
</span><ins>+    node-&gt;setScrolledContentsLayer(scrolledContentsLayer);
</ins><span class="cx">     node-&gt;setCounterScrollingLayer(counterScrollingLayer);
</span><span class="cx"> 
</span><span class="cx">     if (scrollingGeometry) {
</span></span></pre></div>
<a id="trunkSourceWebCorepagescrollingAsyncScrollingCoordinatorh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/scrolling/AsyncScrollingCoordinator.h (169122 => 169123)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/scrolling/AsyncScrollingCoordinator.h        2014-05-20 18:44:52 UTC (rev 169122)
+++ trunk/Source/WebCore/page/scrolling/AsyncScrollingCoordinator.h        2014-05-20 19:13:14 UTC (rev 169123)
</span><span class="lines">@@ -88,7 +88,7 @@
</span><span class="cx">     
</span><span class="cx">     virtual void updateViewportConstrainedNode(ScrollingNodeID, const ViewportConstraints&amp;, GraphicsLayer*) override;
</span><span class="cx">     
</span><del>-    virtual void updateFrameScrollingNode(ScrollingNodeID, GraphicsLayer* scrollLayer, GraphicsLayer* counterScrollingLayer, GraphicsLayer* insetClipLayer, const ScrollingGeometry* = nullptr);
</del><ins>+    virtual void updateFrameScrollingNode(ScrollingNodeID, GraphicsLayer* scrollLayer, GraphicsLayer* scrolledContentsLayer, GraphicsLayer* counterScrollingLayer, GraphicsLayer* insetClipLayer, const ScrollingGeometry* = nullptr);
</ins><span class="cx">     virtual void updateOverflowScrollingNode(ScrollingNodeID, GraphicsLayer* scrollLayer, GraphicsLayer* scrolledContentsLayer, const ScrollingGeometry* = nullptr);
</span><span class="cx">     
</span><span class="cx">     virtual String scrollingStateTreeAsText() const override;
</span></span></pre></div>
<a id="trunkSourceWebCorepagescrollingScrollingCoordinatorh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/scrolling/ScrollingCoordinator.h (169122 => 169123)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/scrolling/ScrollingCoordinator.h        2014-05-20 18:44:52 UTC (rev 169122)
+++ trunk/Source/WebCore/page/scrolling/ScrollingCoordinator.h        2014-05-20 19:13:14 UTC (rev 169123)
</span><span class="lines">@@ -165,7 +165,7 @@
</span><span class="cx">         IntPoint scrollOrigin;
</span><span class="cx">     };
</span><span class="cx"> 
</span><del>-    virtual void updateFrameScrollingNode(ScrollingNodeID, GraphicsLayer* /*scrollLayer*/, GraphicsLayer* /*counterScrollingLayer*/, GraphicsLayer* /*insetClipLayer*/, const ScrollingGeometry* = nullptr) { }
</del><ins>+    virtual void updateFrameScrollingNode(ScrollingNodeID, GraphicsLayer* /*scrollLayer*/, GraphicsLayer* /*scrolledContentsLayer*/, GraphicsLayer* /*counterScrollingLayer*/, GraphicsLayer* /*insetClipLayer*/, const ScrollingGeometry* = nullptr) { }
</ins><span class="cx">     virtual void updateOverflowScrollingNode(ScrollingNodeID, GraphicsLayer* /*scrollLayer*/, GraphicsLayer* /*scrolledContentsLayer*/, const ScrollingGeometry* = nullptr) { }
</span><span class="cx">     virtual void syncChildPositions(const LayoutRect&amp;) { }
</span><span class="cx">     virtual String scrollingStateTreeAsText() const;
</span></span></pre></div>
<a id="trunkSourceWebCorepagescrollingScrollingStateFrameScrollingNodecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/scrolling/ScrollingStateFrameScrollingNode.cpp (169122 => 169123)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/scrolling/ScrollingStateFrameScrollingNode.cpp        2014-05-20 18:44:52 UTC (rev 169122)
+++ trunk/Source/WebCore/page/scrolling/ScrollingStateFrameScrollingNode.cpp        2014-05-20 19:13:14 UTC (rev 169123)
</span><span class="lines">@@ -73,6 +73,9 @@
</span><span class="cx">     , m_requestedScrollPositionRepresentsProgrammaticScroll(stateNode.requestedScrollPositionRepresentsProgrammaticScroll())
</span><span class="cx">     , m_topContentInset(stateNode.topContentInset())
</span><span class="cx"> {
</span><ins>+    if (hasChangedProperty(ScrolledContentsLayer))
+        setScrolledContentsLayer(stateNode.scrolledContentsLayer().toRepresentation(adoptiveTree.preferredLayerRepresentation()));
+
</ins><span class="cx">     if (hasChangedProperty(CounterScrollingLayer))
</span><span class="cx">         setCounterScrollingLayer(stateNode.counterScrollingLayer().toRepresentation(adoptiveTree.preferredLayerRepresentation()));
</span><span class="cx"> 
</span><span class="lines">@@ -171,6 +174,15 @@
</span><span class="cx">     setPropertyChanged(TopContentInset);
</span><span class="cx"> }
</span><span class="cx"> 
</span><ins>+void ScrollingStateFrameScrollingNode::setScrolledContentsLayer(const LayerRepresentation&amp; layerRepresentation)
+{
+    if (layerRepresentation == m_scrolledContentsLayer)
+        return;
+    
+    m_scrolledContentsLayer = layerRepresentation;
+    setPropertyChanged(ScrolledContentsLayer);
+}
+
</ins><span class="cx"> void ScrollingStateFrameScrollingNode::setCounterScrollingLayer(const LayerRepresentation&amp; layerRepresentation)
</span><span class="cx"> {
</span><span class="cx">     if (layerRepresentation == m_counterScrollingLayer)
</span></span></pre></div>
<a id="trunkSourceWebCorepagescrollingScrollingStateFrameScrollingNodeh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/scrolling/ScrollingStateFrameScrollingNode.h (169122 => 169123)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/scrolling/ScrollingStateFrameScrollingNode.h        2014-05-20 18:44:52 UTC (rev 169122)
+++ trunk/Source/WebCore/page/scrolling/ScrollingStateFrameScrollingNode.h        2014-05-20 19:13:14 UTC (rev 169123)
</span><span class="lines">@@ -52,6 +52,7 @@
</span><span class="cx">         NonFastScrollableRegion,
</span><span class="cx">         WheelEventHandlerCount,
</span><span class="cx">         ReasonsForSynchronousScrolling,
</span><ins>+        ScrolledContentsLayer,
</ins><span class="cx">         CounterScrollingLayer,
</span><span class="cx">         InsetClipLayer,
</span><span class="cx">         ContentShadowLayer,
</span><span class="lines">@@ -87,7 +88,10 @@
</span><span class="cx"> 
</span><span class="cx">     float topContentInset() const { return m_topContentInset; }
</span><span class="cx">     void setTopContentInset(float);
</span><del>-    
</del><ins>+
+    const LayerRepresentation&amp; scrolledContentsLayer() const { return m_scrolledContentsLayer; }
+    void setScrolledContentsLayer(const LayerRepresentation&amp;);
+
</ins><span class="cx">     // This is a layer moved in the opposite direction to scrolling, for example for background-attachment:fixed
</span><span class="cx">     const LayerRepresentation&amp; counterScrollingLayer() const { return m_counterScrollingLayer; }
</span><span class="cx">     void setCounterScrollingLayer(const LayerRepresentation&amp;);
</span><span class="lines">@@ -124,6 +128,7 @@
</span><span class="cx"> 
</span><span class="cx">     LayerRepresentation m_counterScrollingLayer;
</span><span class="cx">     LayerRepresentation m_insetClipLayer;
</span><ins>+    LayerRepresentation m_scrolledContentsLayer;
</ins><span class="cx">     LayerRepresentation m_contentShadowLayer;
</span><span class="cx">     LayerRepresentation m_headerLayer;
</span><span class="cx">     LayerRepresentation m_footerLayer;
</span></span></pre></div>
<a id="trunkSourceWebCorepagescrollingmacScrollingTreeFrameScrollingNodeMacmm"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/scrolling/mac/ScrollingTreeFrameScrollingNodeMac.mm (169122 => 169123)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/scrolling/mac/ScrollingTreeFrameScrollingNodeMac.mm        2014-05-20 18:44:52 UTC (rev 169122)
+++ trunk/Source/WebCore/page/scrolling/mac/ScrollingTreeFrameScrollingNodeMac.mm        2014-05-20 19:13:14 UTC (rev 169123)
</span><span class="lines">@@ -77,7 +77,10 @@
</span><span class="cx"> 
</span><span class="cx">     if (scrollingStateNode.hasChangedProperty(ScrollingStateNode::ScrollLayer))
</span><span class="cx">         m_scrollLayer = scrollingStateNode.layer();
</span><del>-    
</del><ins>+
+    if (scrollingStateNode.hasChangedProperty(ScrollingStateFrameScrollingNode::ScrolledContentsLayer))
+        m_scrolledContentsLayer = scrollingStateNode.scrolledContentsLayer();
+
</ins><span class="cx">     if (scrollingStateNode.hasChangedProperty(ScrollingStateFrameScrollingNode::CounterScrollingLayer))
</span><span class="cx">         m_counterScrollingLayer = scrollingStateNode.counterScrollingLayer();
</span><span class="cx"> 
</span></span></pre></div>
<a id="trunkSourceWebCorerenderingRenderLayerCompositorcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/rendering/RenderLayerCompositor.cpp (169122 => 169123)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/rendering/RenderLayerCompositor.cpp        2014-05-20 18:44:52 UTC (rev 169122)
+++ trunk/Source/WebCore/rendering/RenderLayerCompositor.cpp        2014-05-20 19:13:14 UTC (rev 169123)
</span><span class="lines">@@ -3673,7 +3673,7 @@
</span><span class="cx">             scrolledContentsLayer = m_rootContentLayer.get();
</span><span class="cx">             counterScrollingLayer = fixedRootBackgroundLayer();
</span><span class="cx">             insetClipLayer = clipLayer();
</span><del>-            scrollingCoordinator-&gt;updateFrameScrollingNode(nodeID, scrollingLayer, counterScrollingLayer, insetClipLayer);
</del><ins>+            scrollingCoordinator-&gt;updateFrameScrollingNode(nodeID, scrollingLayer, scrolledContentsLayer, counterScrollingLayer, insetClipLayer);
</ins><span class="cx">         } else {
</span><span class="cx">             ScrollingCoordinator::ScrollingGeometry scrollingGeometry;
</span><span class="cx">             scrollingGeometry.scrollOrigin = layer.scrollOrigin();
</span></span></pre></div>
<a id="trunkSourceWebKit2ChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/ChangeLog (169122 => 169123)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/ChangeLog        2014-05-20 18:44:52 UTC (rev 169122)
+++ trunk/Source/WebKit2/ChangeLog        2014-05-20 19:13:14 UTC (rev 169123)
</span><span class="lines">@@ -1,3 +1,24 @@
</span><ins>+2014-05-19  Simon Fraser  &lt;simon.fraser@apple.com&gt;
+
+        REGRESSION (r169063) Fixed and sticky nodes misplaced on scrolling sometimes
+        https://bugs.webkit.org/show_bug.cgi?id=133106
+        &lt;rdar://problem/16967648&gt;
+
+        Reviewed by Sam Weinig.
+
+        Fix regression from r169063. That commit removed scrolledContentsLayers from 
+        frame scrolling nodes, but they do actually use them.
+        
+        So put them back; not in the base class, because they have a somewhat different
+        meaning for overflow scrolling and frame scrolling.
+
+        * Shared/Scrolling/RemoteScrollingCoordinatorTransaction.cpp:
+        (ArgumentCoder&lt;ScrollingStateFrameScrollingNode&gt;::encode):
+        (ArgumentCoder&lt;ScrollingStateFrameScrollingNode&gt;::decode):
+        (WebKit::RemoteScrollingTreeTextStream::dump):
+        * UIProcess/Scrolling/RemoteScrollingCoordinatorProxy.cpp:
+        (WebKit::RemoteScrollingCoordinatorProxy::connectStateNodeLayers):
+
</ins><span class="cx"> 2014-05-20  Alexey Proskuryakov  &lt;ap@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         [Mac] WebProcess doesn't follow localization of UI process when run as a service
</span></span></pre></div>
<a id="trunkSourceWebKit2SharedScrollingRemoteScrollingCoordinatorTransactioncpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/Shared/Scrolling/RemoteScrollingCoordinatorTransaction.cpp (169122 => 169123)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/Shared/Scrolling/RemoteScrollingCoordinatorTransaction.cpp        2014-05-20 18:44:52 UTC (rev 169122)
+++ trunk/Source/WebKit2/Shared/Scrolling/RemoteScrollingCoordinatorTransaction.cpp        2014-05-20 19:13:14 UTC (rev 169123)
</span><span class="lines">@@ -145,6 +145,9 @@
</span><span class="cx">     SCROLLING_NODE_ENCODE(ScrollingStateFrameScrollingNode::FooterHeight, footerHeight)
</span><span class="cx">     SCROLLING_NODE_ENCODE(ScrollingStateFrameScrollingNode::TopContentInset, topContentInset)
</span><span class="cx"> 
</span><ins>+    if (node.hasChangedProperty(ScrollingStateFrameScrollingNode::ScrolledContentsLayer))
+        encoder &lt;&lt; static_cast&lt;GraphicsLayer::PlatformLayerID&gt;(node.scrolledContentsLayer());
+
</ins><span class="cx">     if (node.hasChangedProperty(ScrollingStateFrameScrollingNode::CounterScrollingLayer))
</span><span class="cx">         encoder &lt;&lt; static_cast&lt;GraphicsLayer::PlatformLayerID&gt;(node.counterScrollingLayer());
</span><span class="cx"> 
</span><span class="lines">@@ -220,6 +223,13 @@
</span><span class="cx">     SCROLLING_NODE_DECODE(ScrollingStateFrameScrollingNode::FooterHeight, int, setFooterHeight);
</span><span class="cx">     SCROLLING_NODE_DECODE(ScrollingStateFrameScrollingNode::TopContentInset, float, setTopContentInset);
</span><span class="cx"> 
</span><ins>+    if (node.hasChangedProperty(ScrollingStateFrameScrollingNode::ScrolledContentsLayer)) {
+        GraphicsLayer::PlatformLayerID layerID;
+        if (!decoder.decode(layerID))
+            return false;
+        node.setScrolledContentsLayer(layerID);
+    }
+
</ins><span class="cx">     if (node.hasChangedProperty(ScrollingStateFrameScrollingNode::CounterScrollingLayer)) {
</span><span class="cx">         GraphicsLayer::PlatformLayerID layerID;
</span><span class="cx">         if (!decoder.decode(layerID))
</span><span class="lines">@@ -595,10 +605,12 @@
</span><span class="cx">     if (!changedPropertiesOnly || node.hasChangedProperty(ScrollingStateFrameScrollingNode::TopContentInset))
</span><span class="cx">         dumpProperty(ts, &quot;top-content-inset&quot;, node.topContentInset());
</span><span class="cx"> 
</span><ins>+    if (!changedPropertiesOnly || node.hasChangedProperty(ScrollingStateFrameScrollingNode::ScrolledContentsLayer))
+        dumpProperty(ts, &quot;scrolled-contents-layer&quot;, static_cast&lt;GraphicsLayer::PlatformLayerID&gt;(node.scrolledContentsLayer()));
+
</ins><span class="cx">     if (!changedPropertiesOnly || node.hasChangedProperty(ScrollingStateFrameScrollingNode::InsetClipLayer))
</span><span class="cx">         dumpProperty(ts, &quot;clip-inset-layer&quot;, static_cast&lt;GraphicsLayer::PlatformLayerID&gt;(node.insetClipLayer()));
</span><span class="cx"> 
</span><del>-
</del><span class="cx">     if (!changedPropertiesOnly || node.hasChangedProperty(ScrollingStateFrameScrollingNode::ContentShadowLayer))
</span><span class="cx">         dumpProperty(ts, &quot;content-shadow-layer&quot;, static_cast&lt;GraphicsLayer::PlatformLayerID&gt;(node.contentShadowLayer()));
</span><span class="cx"> 
</span></span></pre></div>
<a id="trunkSourceWebKit2UIProcessScrollingRemoteScrollingCoordinatorProxycpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/UIProcess/Scrolling/RemoteScrollingCoordinatorProxy.cpp (169122 => 169123)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/UIProcess/Scrolling/RemoteScrollingCoordinatorProxy.cpp        2014-05-20 18:44:52 UTC (rev 169122)
+++ trunk/Source/WebKit2/UIProcess/Scrolling/RemoteScrollingCoordinatorProxy.cpp        2014-05-20 19:13:14 UTC (rev 169123)
</span><span class="lines">@@ -103,6 +103,9 @@
</span><span class="cx">         case FrameScrollingNode: {
</span><span class="cx">             ScrollingStateFrameScrollingNode* scrollingStateNode = toScrollingStateFrameScrollingNode(currNode);
</span><span class="cx">             
</span><ins>+            if (scrollingStateNode-&gt;hasChangedProperty(ScrollingStateFrameScrollingNode::ScrolledContentsLayer))
+                scrollingStateNode-&gt;setScrolledContentsLayer(layerTreeHost.getLayer(scrollingStateNode-&gt;scrolledContentsLayer()));
+
</ins><span class="cx">             if (scrollingStateNode-&gt;hasChangedProperty(ScrollingStateFrameScrollingNode::CounterScrollingLayer))
</span><span class="cx">                 scrollingStateNode-&gt;setCounterScrollingLayer(layerTreeHost.getLayer(scrollingStateNode-&gt;counterScrollingLayer()));
</span><span class="cx"> 
</span></span></pre>
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