Pipe impl_latency_takes_priority_ to the RenderScheduler.

cc/scheduler/scheduler.h

Index: cc/scheduler/scheduler.h
diff --git a/cc/scheduler/scheduler.h b/cc/scheduler/scheduler.h
index 98e92c0d3063569d69b31fd8be69f6803f129f64..3a290fb313471abc6b602f569a7ef1f042ac5147 100644
--- a/cc/scheduler/scheduler.h
+++ b/cc/scheduler/scheduler.h
@@ -152,6 +152,9 @@ class CC_EXPORT Scheduler : public BeginFrameObserverMixIn {
   bool BeginImplFrameDeadlinePending() const {
     return !begin_impl_frame_deadline_task_.IsCancelled();
   }
+  bool ImplLatencyTakesPriority() const {
+    return state_machine_.impl_latency_takes_priority();
+  }
 
   base::TimeTicks AnticipatedDrawTime() const;