Send a message through the ozone channel to recreate buffers

content/common/gpu/media/rendering_helper.cc

 // Copyright 2013 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/common/gpu/media/rendering_helper.h"
 
 #include <algorithm>
 #include <numeric>
 #include <vector>
 
@@ skipping 105 matching lines @@
   void OnWindowStateChanged(ui::PlatformWindowState new_state) override {}
 
   void OnLostCapture() override {};
 
   void OnAcceleratedWidgetAvailable(gfx::AcceleratedWidget widget) override {
     accelerated_widget_ = widget;
   };
 
   void OnActivationChanged(bool active) override {};
 
+  void OnChangedSurface() override {}
+
   gfx::AcceleratedWidget accelerated_widget() const {
     return accelerated_widget_;
   }
 
   gfx::Size GetSize() { return platform_window_->GetBounds().size(); }
 
   ui::PlatformWindow* platform_window() const { return platform_window_.get(); }
 
  private:
   scoped_ptr<ui::PlatformWindow> platform_window_;
@@ skipping 712 matching lines @@
   // When the rendering falls behind, drops frames.
   while (scheduled_render_time_ < target) {
     scheduled_render_time_ += frame_duration_;
     DropOneFrameForAllVideos();
   }
 
   message_loop_->PostDelayedTask(
       FROM_HERE, render_task_.callback(), target - now);
 }
 }  // namespace content