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

public/web/WebWidget.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 120 matching lines @@
 
     // Check whether the given point hits any registered touch event handlers.
     virtual bool hasTouchEventHandlersAt(const WebPoint&) { return true; }
 
     // Applies a scroll delta to the root layer, which is bundled with a page
     // scale factor that may apply a CSS transform on the whole document (used
     // for mobile-device pinch zooming). This is triggered by events sent to the
     // compositor thread.
     virtual void applyScrollAndScale(const WebSize& scrollDelta, float scaleFactor) { }
 
+    // Records draw events for the Performance Timeline.
+    virtual void recordDrawTiming(int64_t RectId, const WebVector<std::pair<int, double> >& draws) { }
+
     // Called to inform the WebWidget that mouse capture was lost.
     virtual void mouseCaptureLost() { }
 
     // Called to inform the WebWidget that it has gained or lost keyboard focus.
     virtual void setFocus(bool) { }
 
     // Called to inform the WebWidget of a new composition text.
     // If selectionStart and selectionEnd has the same value, then it indicates
     // the input caret position. If the text is empty, then the existing
     // composition text will be cancelled.
@@ skipping 92 matching lines @@
     // content.
     virtual WebColor backgroundColor() const { return 0xFFFFFFFF; /* SK_ColorWHITE */ }
 
 protected:
     ~WebWidget() { }
 };
 
 } // namespace blink
 
 #endif