Defer starting of animations until after compositing update

Source/core/rendering/RenderLayerCompositor.h

 /*
  * Copyright (C) 2009 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 238 matching lines @@
     // Whether the given RL needs to paint into its own separate backing (and hence would need its own CompositedLayerMapping).
     bool needsOwnBacking(const RenderLayer*) const;
     // Whether the layer could ever be composited.
     bool canBeComposited(const RenderLayer*) const;
 
     // Returns all direct reasons that a layer should be composited.
     CompositingReasons directReasonsForCompositing(const RenderLayer*) const;
 
     void updateDirectCompositingReasons(RenderLayer*);
 
+    void updateCompositingLayersInternal();
+
     // Returns indirect reasons that a layer should be composited because of something in its subtree.
     CompositingReasons subtreeReasonsForCompositing(RenderObject*, bool hasCompositedDescendants, bool has3DTransformedDescendants) const;
 
     // Make or destroy the CompositedLayerMapping for this layer; returns true if the compositedLayerMapping changed.
     bool allocateOrClearCompositedLayerMapping(RenderLayer*);
     bool updateSquashingAssignment(RenderLayer*, SquashingState&);
 
     void clearMappingForRenderLayerIncludingDescendants(RenderLayer*);
 
     // Repaint the given rect (which is layer's coords), and regions of child layers that intersect that rect.
@@ skipping 127 matching lines @@
     OwnPtr<GraphicsLayer> m_layerForScrollCorner;
 #if USE(RUBBER_BANDING)
     OwnPtr<GraphicsLayer> m_layerForOverhangShadow;
 #endif
 };
 
 
 } // namespace WebCore
 
 #endif // RenderLayerCompositor_h