mus: Remove unnecessary GpuMemoryBuffer code from client-lib.

services/ui/public/cpp/gpu_memory_buffer_impl.h

-// Copyright 2016 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 SERVICES_UI_PUBLIC_CPP_GPU_MEMORY_BUFFER_IMPL_H_
-#define SERVICES_UI_PUBLIC_CPP_GPU_MEMORY_BUFFER_IMPL_H_
-
-#include <memory>
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "gpu/command_buffer/common/sync_token.h"
-#include "ui/gfx/geometry/size.h"
-#include "ui/gfx/gpu_memory_buffer.h"
-
-#if defined(USE_OZONE)
-#include "ui/ozone/public/native_pixmap.h"
-#endif
-
-namespace ui {
-
-// Provides common implementation of a GPU memory buffer.
-class GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
- public:
-  ~GpuMemoryBufferImpl() override;
-
-  // Type-checking upcast routine. Returns an NULL on failure.
-  static GpuMemoryBufferImpl* FromClientBuffer(ClientBuffer buffer);
-
-  // Overridden from gfx::GpuMemoryBuffer:
-  gfx::Size GetSize() const override;
-  gfx::BufferFormat GetFormat() const override;
-  gfx::GpuMemoryBufferId GetId() const override;
-  ClientBuffer AsClientBuffer() override;
-
-  // Returns the type of this GpuMemoryBufferImpl.
-  virtual gfx::GpuMemoryBufferType GetBufferType() const = 0;
-
-#if defined(USE_OZONE)
-  // Returns a ui::NativePixmap when one is available.
-  virtual scoped_refptr<ui::NativePixmap> GetNativePixmap();
-#endif
-
- protected:
-  GpuMemoryBufferImpl(gfx::GpuMemoryBufferId id,
-                      const gfx::Size& size,
-                      gfx::BufferFormat format);
-
-  const gfx::GpuMemoryBufferId id_;
-  const gfx::Size size_;
-  const gfx::BufferFormat format_;
-  bool mapped_;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferImpl);
-};
-
-}  // namespace ui
-
-#endif  // SERVICES_UI_PUBLIC_CPP_GPU_MEMORY_BUFFER_IMPL_H_