mus: Fix showing guest views in --mash and --mus.

content/browser/renderer_host/render_widget_host_view_aura.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include <set>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 1567 matching lines @@
 void RenderWidgetHostViewAura::OnWindowTargetVisibilityChanged(bool visible) {
 }
 
 bool RenderWidgetHostViewAura::HasHitTestMask() const {
   return false;
 }
 
 void RenderWidgetHostViewAura::GetHitTestMask(gfx::Path* mask) const {
 }
 
+void RenderWidgetHostViewAura::OnWindowSurfaceChanged(
+    const cc::SurfaceInfo& surface_info) {
+  if (!is_guest_view_hack_)
+    return;
+  host_->GetView()->OnSurfaceChanged(surface_info);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewAura, ui::EventHandler implementation:
 
 void RenderWidgetHostViewAura::OnKeyEvent(ui::KeyEvent* event) {
   event_handler_->OnKeyEvent(event);
 }
 
 void RenderWidgetHostViewAura::OnMouseEvent(ui::MouseEvent* event) {
 #if defined(OS_WIN)
   if (event->type() == ui::ET_MOUSE_MOVED) {
@@ skipping 764 matching lines @@
 }
 
 void RenderWidgetHostViewAura::UpdateNeedsBeginFramesInternal() {
   if (!delegated_frame_host_)
     return;
   delegated_frame_host_->SetNeedsBeginFrames(needs_begin_frames_ ||
                                              needs_flush_input_);
 }
 
 }  // namespace content