Add layer name into frame viewer

cc/layers/layer.h

Index: cc/layers/layer.h
diff --git a/cc/layers/layer.h b/cc/layers/layer.h
index 035e071a5fd19a69849d8a097125c4a3817c193f..1a6fb7b7ce94be4337e0163cafd816b91f79c580 100644
--- a/cc/layers/layer.h
+++ b/cc/layers/layer.h
@@ -38,6 +38,7 @@ struct AnimationEvent;
 class CopyOutputRequest;
 class LayerAnimationDelegate;
 class LayerAnimationEventObserver;
+class LayerClient;
 class LayerImpl;
 class LayerTreeHost;
 class LayerTreeImpl;
@@ -292,7 +293,10 @@ class CC_EXPORT Layer : public base::RefCounted<Layer>,
   virtual void SetIsMask(bool is_mask) {}
   virtual void ReduceMemoryUsage() {}
 
-  void SetDebugName(const std::string& debug_name);
+  virtual std::string DebugName();
+
+  void SetLayerClient(LayerClient* client) { client_ = client; }
+
   void SetCompositingReasons(CompositingReasons reasons);
 
   virtual void PushPropertiesTo(LayerImpl* layer);
@@ -514,6 +518,8 @@ class CC_EXPORT Layer : public base::RefCounted<Layer>,
   // Transient properties.
   float raster_scale_;
 
+  LayerClient* client_;
+
   ScopedPtrVector<CopyOutputRequest> copy_requests_;
 
   base::Closure did_scroll_callback_;