convert //gpu to std::unique_ptr

content/common/gpu/media/media_service.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 "content/common/gpu/media/media_service.h"
 
+#include <memory>
 #include <utility>
 
 #include "content/common/gpu/media/gpu_video_decode_accelerator.h"
 #include "content/common/gpu/media/gpu_video_encode_accelerator.h"
 #include "content/common/gpu/media/media_channel.h"
 #include "gpu/ipc/service/gpu_channel.h"
 #include "gpu/ipc/service/gpu_channel_manager.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/param_traits_macros.h"
 
@@ skipping 14 matching lines @@
 
 void MediaService::RemoveChannel(int32_t client_id) {
   media_channels_.erase(client_id);
 }
 
 void MediaService::DestroyAllChannels() {
   media_channels_.clear();
 }
 
 }  // namespace content