Revert of Mojo multiple command buffer support and sample

mojo/services/gles2/command_buffer_impl.h

 // 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.
 
 #ifndef MOJO_SERVICES_GLES2_COMMAND_BUFFER_IMPL_H_
 #define MOJO_SERVICES_GLES2_COMMAND_BUFFER_IMPL_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/timer/timer.h"
 #include "mojo/public/cpp/system/core.h"
 #include "mojo/services/gles2/command_buffer.mojom.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 
 namespace gpu {
 class CommandBufferService;
 class GpuScheduler;
 class GpuControlService;
 namespace gles2 {
 class GLES2Decoder;
-class MailboxManager;
 }
 }
 
 namespace gfx {
-class GLContext;
-class GLShareGroup;
 class GLSurface;
 }
 
 namespace mojo {
 
 class CommandBufferImpl : public InterfaceImpl<CommandBuffer> {
  public:
-  // Offscreen.
-  CommandBufferImpl(gfx::GLShareGroup* share_group,
-                    gpu::gles2::MailboxManager* mailbox_manager);
-  // Onscreen.
   CommandBufferImpl(gfx::AcceleratedWidget widget,
-                    const gfx::Size& size,
-                    gfx::GLShareGroup* share_group,
-                    gpu::gles2::MailboxManager* mailbox_manager);
+                    const gfx::Size& size);
   virtual ~CommandBufferImpl();
 
   virtual void Initialize(CommandBufferSyncClientPtr sync_client,
                           mojo::ScopedSharedBufferHandle shared_state) OVERRIDE;
   virtual void SetGetBuffer(int32_t buffer) OVERRIDE;
   virtual void Flush(int32_t put_offset) OVERRIDE;
   virtual void MakeProgress(int32_t last_get_offset) OVERRIDE;
   virtual void RegisterTransferBuffer(
       int32_t id,
       mojo::ScopedSharedBufferHandle transfer_buffer,
       uint32_t size) OVERRIDE;
   virtual void DestroyTransferBuffer(int32_t id) OVERRIDE;
   virtual void Echo(const Callback<void()>& callback) OVERRIDE;
 
  private:
   bool DoInitialize(mojo::ScopedSharedBufferHandle shared_state);
 
   void OnResize(gfx::Size size, float scale_factor);
 
   void OnParseError();
 
   CommandBufferSyncClientPtr sync_client_;
 
   gfx::AcceleratedWidget widget_;
   gfx::Size size_;
   scoped_ptr<gpu::CommandBufferService> command_buffer_;
   scoped_ptr<gpu::gles2::GLES2Decoder> decoder_;
   scoped_ptr<gpu::GpuScheduler> scheduler_;
-  scoped_refptr<gfx::GLContext> context_;
   scoped_refptr<gfx::GLSurface> surface_;
-  scoped_refptr<gfx::GLShareGroup> share_group_;
-  scoped_refptr<gpu::gles2::MailboxManager> mailbox_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(CommandBufferImpl);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_GLES2_COMMAND_BUFFER_IMPL_H_