Update from https://crrev.com/303153

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 52560e257e919b8f728acac2d43fac83516c9758..7b1898a9daac5af5bbe41ec1db72f137a0bffbd6 100644
--- a/cc/debug/rendering_stats.h
+++ b/cc/debug/rendering_stats.h
@@ -28,6 +28,8 @@ struct CC_EXPORT RenderingStats {
 
     void Add(const TimeDeltaList& other);
 
+    base::TimeDelta GetLastTimeDelta() const;
+
    private:
     std::list<base::TimeDelta> values;
   };
@@ -53,9 +55,6 @@ struct CC_EXPORT RenderingStats {
     // rendering_stats.cc.
 
     int64 frame_count;
-    base::TimeDelta rasterize_time;
-    base::TimeDelta analysis_time;
-    int64 rasterized_pixel_count;
     int64 visible_content_area;
     int64 approximated_visible_content_area;