Implement GpuArcVideoService for arc video accelerator

content/public/browser/arc_video_host_delegate.h

Index: content/public/browser/arc_video_host_delegate.h
diff --git a/content/public/browser/arc_video_host_delegate.h b/content/public/browser/arc_video_host_delegate.h
new file mode 100644
index 0000000000000000000000000000000000000000..08f54f8dca0feffd58dab781115e1b5f728e85aa
--- /dev/null
+++ b/content/public/browser/arc_video_host_delegate.h
@@ -0,0 +1,21 @@
+// 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 CONTENT_PUBLIC_BROWSER_ARC_VIDEO_HOST_DELEGATE_H_
+#define CONTENT_PUBLIC_BROWSER_ARC_VIDEO_HOST_DELEGATE_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "content/common/content_export.h"
+
+namespace arc {
+class VideoHostDelegate;
+}
+
+namespace content {
+
+CONTENT_EXPORT scoped_ptr<arc::VideoHostDelegate> CreateArcVideoHostDelegate();
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_ARC_VIDEO_HOST_DELEGATE_H_