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

Source/core/inspector/InspectorLayerTreeAgent.h

Index: Source/core/inspector/InspectorLayerTreeAgent.h
diff --git a/Source/core/inspector/InspectorLayerTreeAgent.h b/Source/core/inspector/InspectorLayerTreeAgent.h
index 20c3487a07d428573befac19b46de6266d3d4aab..6e0b519ff94162fa4b7f324c8b6a90dbdf149130 100644
--- a/Source/core/inspector/InspectorLayerTreeAgent.h
+++ b/Source/core/inspector/InspectorLayerTreeAgent.h
@@ -77,6 +77,7 @@ private:
 
     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*);
@@ -84,6 +85,8 @@ private:
     InspectorFrontend::LayerTree* m_frontend;
     Page* m_page;
     InspectorDOMAgent* m_domAgent;
+    Timer<InspectorLayerTreeAgent> m_notificationTimer;
+    bool m_notifyAfterNextLayersUpdate;
 
     HashMap<const RenderLayer*, String> m_documentLayerToIdMap;
 };