Offset rects by origin when projecting from composited to graphics layer.

Source/core/rendering/compositing/CompositedLayerMapping.h

 /*
  * Copyright (C) 2009, 2010, 2011 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
@@ skipping 181 matching lines @@
     bool shouldUpdateGraphicsLayer(GraphicsLayerUpdater::UpdateType updateType) const { return m_needToUpdateGraphicsLayer || updateType == GraphicsLayerUpdater::ForceUpdate; }
     GraphicsLayerUpdater::UpdateType updateTypeForChildren(GraphicsLayerUpdater::UpdateType) const;
     void clearNeedsGraphicsLayerUpdate();
 
 #if !ASSERT_DISABLED
     void assertNeedsToUpdateGraphicsLayerBitsCleared();
 #endif
 
     virtual String debugName(const GraphicsLayer*) OVERRIDE;
 
+    LayoutSize contentOffsetInCompositingLayer() const;

[Ian Vollick, 2014/04/24 03:15:28]

Thanks for fixing the typo :)

+
 private:
     void createPrimaryGraphicsLayer();
     void destroyGraphicsLayers();
 
     PassOwnPtr<GraphicsLayer> createGraphicsLayer(CompositingReasons);
     bool toggleScrollbarLayerIfNeeded(OwnPtr<GraphicsLayer>&, bool needsLayer, CompositingReasons);
 
     RenderLayerModelObject* renderer() const { return m_owningLayer.renderer(); }
     RenderLayerCompositor* compositor() const { return m_owningLayer.compositor(); }
 
@@ skipping 15 matching lines @@
     void updateDrawsContent();
     void updateChildrenTransform();
     void registerScrollingLayers();
 
     void adjustBoundsForSubPixelAccumulation(const RenderLayer* compositedAncestor, IntRect& localCompositingBounds, IntRect& relativeCompositingBounds, IntPoint& delta);
 
     void setBackgroundLayerPaintsFixedRootBackground(bool);
 
     GraphicsLayerPaintingPhase paintingPhaseForPrimaryLayer() const;
 
-    LayoutSize contentOffsetInCompostingLayer() const;
     // Result is transform origin in pixels.
     FloatPoint3D computeTransformOrigin(const IntRect& borderBox) const;
 
     void updateSquashingLayerGeometry(const IntPoint& delta);
 
     void updateOpacity(const RenderStyle*);
     void updateTransform(const RenderStyle*);
     void updateLayerBlendMode(const RenderStyle*);
     void updateIsRootForIsolatedGroup();
     void updateHasGpuRasterizationHint(const RenderStyle*);
@@ skipping 120 matching lines @@
     bool m_requiresOwnBackingStoreForAncestorReasons : 1;
     bool m_canCompositeFilters : 1;
     bool m_backgroundLayerPaintsFixedRootBackground : 1;
     bool m_needToUpdateGraphicsLayer : 1;
     bool m_needToUpdateGraphicsLayerOfAllDecendants : 1;
 };
 
 } // namespace WebCore
 
 #endif // CompositedLayerMapping_h