Revert "Re-land deferred compositing updates with fixed assumptions"

Source/core/inspector/InspectorLayerTreeAgent.h

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google 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.
@@ skipping 59 matching lines @@
     virtual void disable(ErrorString*);
     virtual void compositingReasons(ErrorString*, const String& layerId, RefPtr<TypeBuilder::Array<String> >&);
 
 private:
     typedef HashMap<int, int> LayerIdToNodeIdMap;
 
     InspectorLayerTreeAgent(InstrumentingAgents*, InspectorCompositeState*, InspectorDOMAgent*, Page*);
 
     RenderLayerCompositor* renderLayerCompositor();
     GraphicsLayer* layerById(ErrorString*, const String& layerId);
+    void notificationTimerFired(Timer<InspectorLayerTreeAgent>*);
     PassRefPtr<TypeBuilder::Array<TypeBuilder::LayerTree::Layer> > buildLayerTree();
     void buildLayerIdToNodeIdMap(RenderLayer*, LayerIdToNodeIdMap&);
     int idForNode(Node*);
 
     InspectorFrontend::LayerTree* m_frontend;
     Page* m_page;
     InspectorDOMAgent* m_domAgent;
+    Timer<InspectorLayerTreeAgent> m_notificationTimer;
+    bool m_notifyAfterNextLayersUpdate;
 
     HashMap<const RenderLayer*, String> m_documentLayerToIdMap;
 };
 
 } // namespace WebCore
 
 
 #endif // !defined(InspectorLayerTreeAgent_h)