WebThreadImplForMessageLoop to use blink scheduler

content/child/blink_platform_impl.h

Index: content/child/blink_platform_impl.h
diff --git a/content/child/blink_platform_impl.h b/content/child/blink_platform_impl.h
index 785b0d6418ab422953d6398df517f5bdf7c914c1..4a7efadc013a846454d63f2869d9e79362245755 100644
--- a/content/child/blink_platform_impl.h
+++ b/content/child/blink_platform_impl.h
@@ -162,6 +162,10 @@ class CONTENT_EXPORT BlinkPlatformImpl
   void ResumeSharedTimer();
   virtual void OnStartSharedTimer(base::TimeDelta delay) {}
 
+ protected:
+  base::OneShotTimer<BlinkPlatformImpl> shared_timer_;
+  scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
+
  private:
   static void DestroyCurrentThread(void*);
 
@@ -172,8 +176,6 @@ class CONTENT_EXPORT BlinkPlatformImpl
 
   WebThemeEngineImpl native_theme_engine_;
   WebFallbackThemeEngineImpl fallback_theme_engine_;
-  base::MessageLoop* main_loop_;
-  base::OneShotTimer<BlinkPlatformImpl> shared_timer_;
   void (*shared_timer_func_)();
   double shared_timer_fire_time_;
   bool shared_timer_fire_time_was_set_while_suspended_;