time metric: record elapsed time from when the backgrounded and purged renderer is foregrounded unti

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index c40009f7fcbd539a5186a90cded92a34cbd7aa90..a22fec6d3dc9692b67f7fe6b7725a068c9089402 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -844,6 +844,9 @@ class CONTENT_EXPORT RenderWidget
   // session, this info is sent to the browser along with other drag/drop info.
   DragEventSourceInfo possible_drag_event_info_;
 
+  bool time_to_first_active_paint_recorded_;
+  base::TimeTicks was_shown_time_;
+
   base::WeakPtrFactory<RenderWidget> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);