Implement GpuArcVideoService for arc video accelerator

content/common/gpu/media/gpu_arc_accelerator.h

Index: content/common/gpu/media/gpu_arc_accelerator.h
diff --git a/content/common/gpu/media/gpu_arc_accelerator.h b/content/common/gpu/media/gpu_arc_accelerator.h
new file mode 100644
index 0000000000000000000000000000000000000000..5379c612aee5c1e90baa4aef92ec212d3faa424d
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+++ b/content/common/gpu/media/gpu_arc_accelerator.h
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+// Copyright 2015 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 CONTENT_COMMON_GPU_MEDIA_GPU_ARC_ACCELERATOR_H_
+#define CONTENT_COMMON_GPU_MEDIA_GPU_ARC_ACCELERATOR_H_
+
+#include <map>
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "base/threading/non_thread_safe.h"
+#include "base/threading/thread.h"
+#include "media/video/arc_video_accelerator.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+class WaitableEvent;
+}
+
+namespace IPC {
+struct ChannelHandle;
+}
+
+namespace content {
+class GpuChannel;
+
+class GpuArcAccelerator : public base::NonThreadSafe {
+ public:
+  class Client;
+
+  GpuArcAccelerator(
+      GpuChannel* channel,
+      base::WaitableEvent* shutdown_event,
+      const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner);
+  ~GpuArcAccelerator();
+
+  void Initialize();
+
+  void CreateClient(uint32_t device_type);
+
+  void RemoveClientOnArcThread(Client* client);
+
+ private:
+  void CreateClientOnArcThread(uint32_t device_type);
+  void RemoveAllClientsOnArcThread(base::WaitableEvent* done);
+
+  // GpuChannel outlives this class. So a raw pointer is safe.
+  GpuChannel* gpu_channel_;
+
+  // Shutdown event of GPU process.
+  base::WaitableEvent* shutdown_event_;
+
+  // GPU io thread task runner.
+  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
+
+  // GPU main thread task runner.
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+
+  // Arc accelerator thread.
+  base::Thread arc_accelerator_thread_;
+
+  // Arc accelerator task runner.
+  scoped_refptr<base::SingleThreadTaskRunner> arc_task_runner_;
+
+  // Bookkeeping all clients. Only accessed on arc thread.
+  std::map<Client*, scoped_ptr<Client>> clients_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(GpuArcAccelerator);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_GPU_MEDIA_GPU_ARC_ACCELERATOR_H_