Remove calls to MessageLoop::current() in components.

components/mus/gpu/gpu_service_mus.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 COMPONENTS_MUS_GPU_GPU_SERVICE_MUS_H_
 #define COMPONENTS_MUS_GPU_GPU_SERVICE_MUS_H_
 
 #include "base/callback.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/non_thread_safe.h"
@@ skipping 116 matching lines @@
   void EstablishGpuChannelOnGpuThread(int client_id,
                                       uint64_t client_tracing_id,
                                       bool preempts,
                                       bool allow_view_command_buffers,
                                       bool allow_real_time_streams,
                                       IPC::ChannelHandle* channel_handle);
 
   // The next client id.
   int next_client_id_;
 
-  // The main thread message loop.
-  base::MessageLoop* main_message_loop_;
+  // The main thread task runner.
+  scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
 
   // An event that will be signalled when we shutdown.
   base::WaitableEvent shutdown_event_;
 
   // The main thread for GpuService.
   base::Thread gpu_thread_;
 
   // The thread that handles IO events for GpuService.
   base::Thread io_thread_;
 
@@ skipping 15 matching lines @@
 
   // Information about the GPU, such as device and vendor ID.
   gpu::GPUInfo gpu_info_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuServiceMus);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_GPU_GPU_SERVICE_MUS_H_