DevTools: add instrumentation for deferred canvas rasterization

Source/core/inspector/TimelineTraceEventProcessor.h

Index: Source/core/inspector/TimelineTraceEventProcessor.h
diff --git a/Source/core/inspector/TimelineTraceEventProcessor.h b/Source/core/inspector/TimelineTraceEventProcessor.h
index 8eb011e8f8eb0c46afc8ef08fb4e1d81b19d1761..94a4c5e011f6178cd206d0259eb7c66912adad66 100644
--- a/Source/core/inspector/TimelineTraceEventProcessor.h
+++ b/Source/core/inspector/TimelineTraceEventProcessor.h
@@ -230,23 +230,26 @@ private:
     void registerHandler(const char* name, TraceEventPhase, TraceEventHandler);
 
     void onBeginFrame(const TraceEvent&);
+    void onUpdateLayerBegin(const TraceEvent&);
+    void onUpdateLayerEnd(const TraceEvent&);
     void onPaintSetupBegin(const TraceEvent&);
     void onPaintSetupEnd(const TraceEvent&);
-    void onPaintLayerBegin(const TraceEvent&);
-    void onPaintLayerEnd(const TraceEvent&);
     void onRasterTaskBegin(const TraceEvent&);
     void onRasterTaskEnd(const TraceEvent&);
+    void onPaint(const TraceEvent&);
     void onImageDecodeTaskBegin(const TraceEvent&);
     void onImageDecodeTaskEnd(const TraceEvent&);
     void onImageDecodeBegin(const TraceEvent&);
     void onImageDecodeEnd(const TraceEvent&);
+    void onRasterizeCanvasBegin(const TraceEvent&);
+    void onRasterizeCanvasEnd(const TraceEvent&);
     void onLayerDeleted(const TraceEvent&);
-    void onPaint(const TraceEvent&);
 
     WeakPtr<InspectorTimelineAgent> m_timelineAgent;
     TimelineTimeConverter m_timeConverter;
     InspectorClient* m_inspectorClient;
     unsigned long long m_pageId;
+    int m_layerTreeId;
 
     typedef HashMap<std::pair<String, int>, TraceEventHandler> HandlersMap;
     HandlersMap m_handlersByType;