MouseMove when the mouse is down to signal compositor priority

content/renderer/scheduler/renderer_scheduler_impl.h

Index: content/renderer/scheduler/renderer_scheduler_impl.h
diff --git a/content/renderer/scheduler/renderer_scheduler_impl.h b/content/renderer/scheduler/renderer_scheduler_impl.h
index 0ad18bbdd20c9d9f62e6ff7bdfcd8356ebd94919..32de7d12506b020455049616101a2f8ea66e7686 100644
--- a/content/renderer/scheduler/renderer_scheduler_impl.h
+++ b/content/renderer/scheduler/renderer_scheduler_impl.h
@@ -135,10 +135,11 @@ class CONTENT_EXPORT RendererSchedulerImpl : public RendererScheduler {
 
   base::TimeTicks estimated_next_frame_begin_;
 
-  // The incoming_signals_lock_ mutex protects access to last_input_time_
-  // and write access to policy_may_need_update_.
+  // The incoming_signals_lock_ mutex protects access to last_input_time_,
+  // mouse_down_ and write access to policy_may_need_update_.
   base::Lock incoming_signals_lock_;
   base::TimeTicks last_input_time_;
+  bool mouse_down_;

[Sami, 2015/02/05 15:27:28]

This doesn't seem to be actually protected by the mutex.

[alex clarke (OOO till 29th), 2015/02/05 17:47:16]

Acknowledged.

   PollableNeedsUpdateFlag policy_may_need_update_;
 
   scoped_refptr<cc::TestNowSource> time_source_;