Include debug name in GraphicsLayerDebugInfo.

Source/platform/graphics/GraphicsLayerDebugInfo.h

 /*
  * Copyright (C) 2014 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 31 matching lines @@
 
 class GraphicsLayerDebugInfo FINAL : public blink::WebGraphicsLayerDebugInfo {
 public:
     GraphicsLayerDebugInfo();
     virtual ~GraphicsLayerDebugInfo();
 
     virtual void appendAsTraceFormat(blink::WebString* out) const OVERRIDE;
 
     GraphicsLayerDebugInfo* clone() const;
 
-    Vector<LayoutRect>& currentLayoutRects() { return m_currentLayoutRects; }
+    void setDebugName(const String& name) { m_debugName = name; }
     CompositingReasons compositingReasons() const { return m_compositingReasons; }
     void setCompositingReasons(CompositingReasons reasons) { m_compositingReasons = reasons; }
+    Vector<LayoutRect>& currentLayoutRects() { return m_currentLayoutRects; }
 
 private:
     void appendLayoutRects(JSONObject*) const;
     void appendCompositingReasons(JSONObject*) const;
+    void appendDebugName(JSONObject*) const;
 
+    String m_debugName;
     CompositingReasons m_compositingReasons;
     Vector<LayoutRect> m_currentLayoutRects;
 };
 
 } // namespace WebCore
 
 #endif