Implement TextureImageTransportSurface using texture mailbox

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index b2e859194ddafb585d28b4f2014a49d256c94f3f..dec469066371ed3ab45e1c5aac04f6908a1bf114 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -401,17 +401,6 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
   // TODO(jbates) Once the compositor thread is always on, this can be removed.
   void AcknowledgeSwapBuffersToRenderer();
 
-#if defined(USE_AURA)
-  // Called by the view in response to visibility changes:
-  // 1. After the front surface is guarenteed to no longer be in use by the ui
-  //    (protected false),
-  // 2. When the ui expects to have a valid front surface (protected true).
-  static void SendFrontSurfaceIsProtected(bool is_protected,
-                                          uint32 protection_state_id,
-                                          int32 route_id,
-                                          int gpu_host_id);
-#endif
-
   // Signals that the compositing surface was updated, e.g. after a lost context
   // event.
   void CompositingSurfaceUpdated();