mus-gpu: Talk to the GpuHost from the IO thread.

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/synchronization/waitable_event.h"
 #include "base/threading/non_thread_safe.h"
@@ skipping 137 matching lines @@
   gpu::GpuMemoryBufferFactory* gpu_memory_buffer_factory_;
 
   gpu::GpuPreferences gpu_preferences_;
 
   // Information about the GPU, such as device and vendor ID.
   gpu::GPUInfo gpu_info_;
 
   // Information about general chrome feature support for the GPU.
   gpu::GpuFeatureInfo gpu_feature_info_;
 
-  mojom::GpuHostPtr gpu_host_;
+  scoped_refptr<mojom::ThreadSafeGpuHostPtr> gpu_host_;
   std::unique_ptr<gpu::GpuChannelManager> gpu_channel_manager_;
   std::unique_ptr<media::MediaGpuChannelManager> media_gpu_channel_manager_;
 
   // On some platforms (e.g. android webview), the SyncPointManager comes from
   // external sources.
   std::unique_ptr<gpu::SyncPointManager> owned_sync_point_manager_;
   gpu::SyncPointManager* sync_point_manager_ = nullptr;
 
   mojo::BindingSet<mojom::GpuService> bindings_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuService);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_GPU_GPU_SERVICE_H_