cc: Add frame data to LTHI tracing

cc/trees/layer_tree_host_impl.h

Index: cc/trees/layer_tree_host_impl.h
diff --git a/cc/trees/layer_tree_host_impl.h b/cc/trees/layer_tree_host_impl.h
index f4663ebcc5039a567f4e9a36d446aa3ad74956b5..472366f00cdf25d5ced2bc751a323c22eb785368 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -134,6 +134,7 @@ class CC_EXPORT LayerTreeHostImpl
   struct CC_EXPORT FrameData : public RenderPassSink {
     FrameData();
     virtual ~FrameData();
+    scoped_ptr<base::Value> AsValue() const;
 
     std::vector<gfx::Rect> occluding_screen_space_rects;
     std::vector<gfx::Rect> non_occluding_screen_space_rects;
@@ -369,7 +370,8 @@ class CC_EXPORT LayerTreeHostImpl
 
   virtual base::TimeTicks CurrentPhysicalTimeTicks() const;
 
-  scoped_ptr<base::Value> AsValue() const;
+  scoped_ptr<base::Value> AsValue() const { return AsValueWithFrame(NULL); }
+  scoped_ptr<base::Value> AsValueWithFrame(FrameData* frame) const;
   scoped_ptr<base::Value> ActivationStateAsValue() const;
 
   bool page_scale_animation_active() const { return !!page_scale_animation_; }