Revert of Mojo multiple command buffer support and sample

mojo/services/native_viewport/native_viewport_impl.h

 // Copyright 2014 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.
 
 #ifndef MOJO_SERVICES_NATIVE_VIEWPORT_IMPL_H_
 #define MOJO_SERVICES_NATIVE_VIEWPORT_IMPL_H_
 
 #include "base/memory/weak_ptr.h"
+#include "mojo/services/gles2/command_buffer_impl.h"
 #include "mojo/services/native_viewport/platform_viewport.h"
 #include "mojo/services/public/interfaces/native_viewport/native_viewport.mojom.h"
 
 namespace ui {
 class Event;
 }
 
 namespace mojo {
 
 class NativeViewportImpl : public InterfaceImpl<NativeViewport>,
                            public PlatformViewport::Delegate {
  public:
   NativeViewportImpl();
   virtual ~NativeViewportImpl();
 
   // InterfaceImpl<NativeViewport> implementation.
   virtual void Create(RectPtr bounds) OVERRIDE;
   virtual void Show() OVERRIDE;
   virtual void Hide() OVERRIDE;
   virtual void Close() OVERRIDE;
   virtual void SetBounds(RectPtr bounds) OVERRIDE;
+  virtual void CreateGLES2Context(
+      InterfaceRequest<CommandBuffer> command_buffer_request) OVERRIDE;
 
   // PlatformViewport::Delegate implementation.
   virtual void OnBoundsChanged(const gfx::Rect& bounds) OVERRIDE;
   virtual void OnAcceleratedWidgetAvailable(
       gfx::AcceleratedWidget widget) OVERRIDE;
   virtual bool OnEvent(ui::Event* ui_event) OVERRIDE;
   virtual void OnDestroyed() OVERRIDE;
 
   void AckEvent();
+  void CreateCommandBufferIfNeeded();
 
  private:
+  void AckDestroyed();
 
   gfx::AcceleratedWidget widget_;
   scoped_ptr<PlatformViewport> platform_viewport_;
+  InterfaceRequest<CommandBuffer> command_buffer_request_;
+  scoped_ptr<CommandBufferImpl> command_buffer_;
   bool waiting_for_event_ack_;
   base::WeakPtrFactory<NativeViewportImpl> weak_factory_;
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_NATIVE_VIEWPORT_IMPL_H_