Make ReflectorImpl use mailboxes

content/browser/renderer_host/render_widget_host_view_aura.h

Index: content/browser/renderer_host/render_widget_host_view_aura.h
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.h b/content/browser/renderer_host/render_widget_host_view_aura.h
index 417729521c14f78efcb118cf3291d6e7dd91f279..b74f7f39d89eef6dcec3b161925205d5f0924a4c 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.h
+++ b/content/browser/renderer_host/render_widget_host_view_aura.h
@@ -477,10 +477,6 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   // Called prior to removing |window_| from a WindowEventDispatcher.
   void RemovingFromRootWindow();
 
-  // Called after commit for the last reference to the texture going away
-  // after it was released as the frontbuffer.
-  void SetSurfaceNotInUseByCompositor(scoped_refptr<ui::Texture>);
-
   // Called after async thumbnailer task completes.  Scales and crops the result
   // of the copy.
   static void CopyFromCompositingSurfaceHasResult(