Add layer name into frame viewer

cc/layers/content_layer.h

 // Copyright 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_LAYERS_CONTENT_LAYER_H_
 #define CC_LAYERS_CONTENT_LAYER_H_
 
+#include <string>
+
 #include "base/basictypes.h"
 #include "cc/base/cc_export.h"
 #include "cc/layers/tiled_layer.h"
 #include "cc/resources/layer_painter.h"
 
 class SkCanvas;
 
 namespace cc {
 
 class ContentLayerClient;
@@ skipping 27 matching lines @@
       OVERRIDE;
   virtual void Update(ResourceUpdateQueue* queue,
                       const OcclusionTracker* occlusion,
                       RenderingStats* stats) OVERRIDE;
   virtual bool NeedMoreUpdates() OVERRIDE;
 
   virtual void SetContentsOpaque(bool contents_opaque) OVERRIDE;
 
   virtual bool SupportsLCDText() const OVERRIDE;
 
+  virtual std::string DebugName() OVERRIDE;
+
  protected:
   explicit ContentLayer(ContentLayerClient* client);
   virtual ~ContentLayer();
 
  private:
   // TiledLayer implementation.
   virtual LayerUpdater* Updater() const OVERRIDE;
   virtual void CreateUpdaterIfNeeded() OVERRIDE;
 
   void UpdateCanUseLCDText();
 
   ContentLayerClient* client_;
   scoped_refptr<LayerUpdater> updater_;
   bool can_use_lcd_text_last_frame_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentLayer);
 };
 
 }  // namespace cc
 #endif  // CC_LAYERS_CONTENT_LAYER_H_