gpu: Destroy the BindingSet on the thread it's bound on.

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 166 matching lines @@
 
   // 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;
 
   // Whether this is running in the same process as the gpu host.
   bool in_host_process_ = false;
   base::Time start_time_;
 
-  mojo::BindingSet<mojom::GpuService> bindings_;
+  std::unique_ptr<mojo::BindingSet<mojom::GpuService>> bindings_;
 
   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_