viz: Use a simple GpuMemoryBufferManager implementation.

services/ui/gpu/gpu_service.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_GPU_GPU_SERVICE_H_
 #define SERVICES_UI_GPU_GPU_SERVICE_H_
 
 #include "base/callback.h"
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/waitable_event.h"
@@ skipping 55 matching lines @@
 
   media::MediaGpuChannelManager* media_gpu_channel_manager() {
     return media_gpu_channel_manager_.get();
   }
 
   gpu::GpuChannelManager* gpu_channel_manager() {
     return gpu_channel_manager_.get();
   }
 
   gpu::ImageFactory* gpu_image_factory();
+  gpu::GpuMemoryBufferFactory* gpu_memory_buffer_factory() {
+    return gpu_memory_buffer_factory_.get();
+  }
 
   gpu::GpuWatchdogThread* watchdog_thread() { return watchdog_thread_.get(); }
 
   const gpu::GpuFeatureInfo& gpu_feature_info() const {
     return gpu_feature_info_;
   }
 
   void set_in_host_process(bool in_host_process) {
     in_host_process_ = in_host_process;
   }
@@ skipping 115 matching lines @@
 
   base::WeakPtr<GpuService> weak_ptr_;
   base::WeakPtrFactory<GpuService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuService);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_GPU_GPU_SERVICE_H_