Add duration estimation data to RenderingStats.

cc/debug/rendering_stats.h

Index: cc/debug/rendering_stats.h
diff --git a/cc/debug/rendering_stats.h b/cc/debug/rendering_stats.h
index bd3b7c7244282fdd6888ae31fc67d0ea41de8758..ead9f8cdfda337ca290219f2bf40df512c9b0076 100644
--- a/cc/debug/rendering_stats.h
+++ b/cc/debug/rendering_stats.h
@@ -38,6 +38,13 @@ struct CC_EXPORT ImplThreadRenderingStats {
   int64 visible_content_area;
   int64 approximated_visible_content_area;
 
+  base::TimeDelta draw_duration;
+  base::TimeDelta draw_duration_estimate;
+  base::TimeDelta begin_main_frame_to_commit_duration;
+  base::TimeDelta begin_main_frame_to_commit_duration_estimate;
+  base::TimeDelta commit_to_activate_duration;
+  base::TimeDelta commit_to_activate_duration_estimate;
+
   ImplThreadRenderingStats();
   scoped_refptr<base::debug::ConvertableToTraceFormat> AsTraceableData() const;
   void Add(const ImplThreadRenderingStats& other);