gpu: Directly cast ClientBuffer to gfx::GpuMemoryBuffer

services/ui/ws/mus_gpu_memory_buffer_manager.cc

 // 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.
 
 #include "services/ui/ws/mus_gpu_memory_buffer_manager.h"
 
 #include "base/logging.h"
 #include "gpu/ipc/client/gpu_memory_buffer_impl.h"
 #include "gpu/ipc/client/gpu_memory_buffer_impl_shared_memory.h"
 #include "gpu/ipc/common/gpu_memory_buffer_support.h"
@@ skipping 42 matching lines @@
 
 std::unique_ptr<gfx::GpuMemoryBuffer>
 MusGpuMemoryBufferManager::CreateGpuMemoryBufferFromHandle(
     const gfx::GpuMemoryBufferHandle& handle,
     const gfx::Size& size,
     gfx::BufferFormat format) {
   NOTIMPLEMENTED();
   return nullptr;
 }
 
-gfx::GpuMemoryBuffer*
-MusGpuMemoryBufferManager::GpuMemoryBufferFromClientBuffer(
-    ClientBuffer buffer) {
-  return gpu::GpuMemoryBufferImpl::FromClientBuffer(buffer);
-}
-
 void MusGpuMemoryBufferManager::SetDestructionSyncToken(
     gfx::GpuMemoryBuffer* buffer,
     const gpu::SyncToken& sync_token) {
   static_cast<gpu::GpuMemoryBufferImpl*>(buffer)->set_destruction_sync_token(
       sync_token);
 }
 
 void MusGpuMemoryBufferManager::DestroyGpuMemoryBuffer(
     gfx::GpuMemoryBufferId id,
     int client_id,
     bool is_native,
     const gpu::SyncToken& sync_token) {
   if (is_native) {
     gpu_service_->DestroyGpuMemoryBuffer(id, client_id, sync_token);
   }
 }
 
 }  // namespace ws
 }  // namespace ui