[not for review] Add Draw entries to window Performance Timeline

Source/core/frame/Frame.h

Index: Source/core/frame/Frame.h
diff --git a/Source/core/frame/Frame.h b/Source/core/frame/Frame.h
index 498cb77c81bfd740d26d1fdc0c02b6131f656796..89c8672d3dcacb7c0b2a7f804b16ecb32e1b2e71 100644
--- a/Source/core/frame/Frame.h
+++ b/Source/core/frame/Frame.h
@@ -86,6 +86,8 @@ public:
 
     RenderPart* ownerRenderer() const; // Renderer for the element that contains this frame.
 
+    int64_t frameID() const { return m_frameID; }
+
     // FIXME: These should move to RemoteFrame when that is instantiated.
     void setRemotePlatformLayer(blink::WebLayer*);
     blink::WebLayer* remotePlatformLayer() const { return m_remotePlatformLayer; }
@@ -110,6 +112,10 @@ protected:
 
 private:
     FrameClient* m_client;
+
+    // Temporary hack for history.
+    int64_t m_frameID;
+
     blink::WebLayer* m_remotePlatformLayer;
 };