1 files changed, 26 insertions, 9 deletions
diff --git a/Source/WebCore/page/scrolling/ScrollingStateFixedNode.cpp b/Source/WebCore/page/scrolling/ScrollingStateFixedNode.cpp
index cce42eb7e..17d016597 100644
--- a/Source/WebCore/page/scrolling/ScrollingStateFixedNode.cpp
+++ b/Source/WebCore/page/scrolling/ScrollingStateFixedNode.cpp
@@ -27,17 +27,17 @@
 #include "ScrollingStateFixedNode.h"
 
 #include "GraphicsLayer.h"
+#include "Logging.h"
 #include "ScrollingStateTree.h"
 #include "TextStream.h"
-#include <wtf/OwnPtr.h>
 
 #if ENABLE(ASYNC_SCROLLING) || USE(COORDINATED_GRAPHICS)
 
 namespace WebCore {
 
-PassOwnPtr<ScrollingStateFixedNode> ScrollingStateFixedNode::create(ScrollingStateTree& stateTree, ScrollingNodeID nodeID)
+Ref<ScrollingStateFixedNode> ScrollingStateFixedNode::create(ScrollingStateTree& stateTree, ScrollingNodeID nodeID)
 {
-    return adoptPtr(new ScrollingStateFixedNode(stateTree, nodeID));
+    return adoptRef(*new ScrollingStateFixedNode(stateTree, nodeID));
 }
 
 ScrollingStateFixedNode::ScrollingStateFixedNode(ScrollingStateTree& tree, ScrollingNodeID nodeID)
@@ -55,9 +55,9 @@ ScrollingStateFixedNode::~ScrollingStateFixedNode()
 {
 }
 
-PassOwnPtr<ScrollingStateNode> ScrollingStateFixedNode::clone(ScrollingStateTree& adoptiveTree)
+Ref<ScrollingStateNode> ScrollingStateFixedNode::clone(ScrollingStateTree& adoptiveTree)
 {
-    return adoptPtr(new ScrollingStateFixedNode(*this, adoptiveTree));
+    return adoptRef(*new ScrollingStateFixedNode(*this, adoptiveTree));
 }
 
 void ScrollingStateFixedNode::updateConstraints(const FixedPositionViewportConstraints& constraints)
@@ -69,14 +69,31 @@ void ScrollingStateFixedNode::updateConstraints(const FixedPositionViewportConst
     setPropertyChanged(ViewportConstraints);
 }
 
-void ScrollingStateFixedNode::syncLayerPositionForViewportRect(const LayoutRect& viewportRect)
+void ScrollingStateFixedNode::reconcileLayerPositionForViewportRect(const LayoutRect& viewportRect, ScrollingLayerPositionAction action)
 {
     FloatPoint position = m_constraints.layerPositionForViewportRect(viewportRect);
-    if (layer().representsGraphicsLayer())
-        static_cast<GraphicsLayer*>(layer())->syncPosition(position);
+    if (layer().representsGraphicsLayer()) {
+        GraphicsLayer* graphicsLayer = static_cast<GraphicsLayer*>(layer());
+
+        LOG_WITH_STREAM(Compositing, stream << "ScrollingStateFixedNode::reconcileLayerPositionForViewportRect setting position of layer " << graphicsLayer->primaryLayerID() << " to " << position);
+        
+        switch (action) {
+        case ScrollingLayerPositionAction::Set:
+            graphicsLayer->setPosition(position);
+            break;
+
+        case ScrollingLayerPositionAction::SetApproximate:
+            graphicsLayer->setApproximatePosition(position);
+            break;
+        
+        case ScrollingLayerPositionAction::Sync:
+            graphicsLayer->syncPosition(position);
+            break;
+        }
+    }
 }
 
-void ScrollingStateFixedNode::dumpProperties(TextStream& ts, int indent) const
+void ScrollingStateFixedNode::dumpProperties(TextStream& ts, int indent, ScrollingStateTreeAsTextBehavior) const
 {
     ts << "(" << "Fixed node" << "\n";