mus: Remove unnecessary GpuMemoryBuffer code from client-lib.

services/ui/public/cpp/mojo_gpu_memory_buffer.h

-// Copyright 2015 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_MOJO_GPU_MEMORY_BUFFER_H_
-#define SERVICES_UI_PUBLIC_CPP_MOJO_GPU_MEMORY_BUFFER_H_
-
-#include <stddef.h>
-
-#include <memory>
-
-#include "base/macros.h"
-#include "services/ui/public/cpp/gpu_memory_buffer_impl.h"
-#include "ui/gfx/geometry/size.h"
-#include "ui/gfx/gpu_memory_buffer.h"
-
-namespace ui {
-
-class MojoGpuMemoryBufferImpl : public ui::GpuMemoryBufferImpl {
- public:
-  ~MojoGpuMemoryBufferImpl() override;
-
-  static std::unique_ptr<gfx::GpuMemoryBuffer> Create(const gfx::Size& size,
-                                                      gfx::BufferFormat format,
-                                                      gfx::BufferUsage usage);
-  static std::unique_ptr<gfx::GpuMemoryBuffer> CreateFromHandle(
-      const gfx::GpuMemoryBufferHandle& handle,
-      const gfx::Size& size,
-      gfx::BufferFormat format,
-      gfx::BufferUsage usage);
-  static MojoGpuMemoryBufferImpl* FromClientBuffer(ClientBuffer buffer);
-
-  const unsigned char* GetMemory() const;
-
-  // Overridden from gfx::GpuMemoryBuffer:
-  bool Map() override;
-  void* memory(size_t plane) override;
-  void Unmap() override;
-  int stride(size_t plane) const override;
-  gfx::GpuMemoryBufferHandle GetHandle() const override;
-
-  // Overridden from gfx::GpuMemoryBufferImpl
-  gfx::GpuMemoryBufferType GetBufferType() const override;
-
- private:
-  MojoGpuMemoryBufferImpl(const gfx::Size& size,
-                          gfx::BufferFormat format,
-                          std::unique_ptr<base::SharedMemory> shared_memory,
-                          uint32_t offset,
-                          int32_t stride);
-
-  std::unique_ptr<base::SharedMemory> shared_memory_;
-  const uint32_t offset_;
-  const int32_t stride_;
-
-  DISALLOW_COPY_AND_ASSIGN(MojoGpuMemoryBufferImpl);
-};
-
-}  // namespace ui
-
-#endif  // SERVICES_UI_PUBLIC_CPP_MOJO_GPU_MEMORY_BUFFER_H_