Redirect the MessageLoop's task runner to the renderer scheduler

components/scheduler/child/scheduler_message_loop_delegate.h

Index: components/scheduler/child/scheduler_message_loop_delegate.h
diff --git a/components/scheduler/child/scheduler_message_loop_delegate.h b/components/scheduler/child/scheduler_message_loop_delegate.h
index 164ab31768a413eb607c0d2fd14c1cda36727641..78d1856a5e48186c578767f17708a85adda163dd 100644
--- a/components/scheduler/child/scheduler_message_loop_delegate.h
+++ b/components/scheduler/child/scheduler_message_loop_delegate.h
@@ -19,6 +19,8 @@ class SCHEDULER_EXPORT SchedulerMessageLoopDelegate
       base::MessageLoop* message_loop);
 
   // NestableSingleThreadTaskRunner implementation
+  void SetDefaultTaskRunner(
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner) override;
   bool PostDelayedTask(const tracked_objects::Location& from_here,
                        const base::Closure& task,
                        base::TimeDelta delay) override;
@@ -39,6 +41,7 @@ class SCHEDULER_EXPORT SchedulerMessageLoopDelegate
 
   // Not owned.
   base::MessageLoop* message_loop_;
+  scoped_refptr<SingleThreadTaskRunner> message_loop_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(SchedulerMessageLoopDelegate);
 };