Use GVR async reprojection video surface for fullscreen in VR shell

content/browser/media/android/video_surface_manager_impl.h

Index: content/browser/media/android/video_surface_manager_impl.h
diff --git a/content/browser/media/android/video_surface_manager_impl.h b/content/browser/media/android/video_surface_manager_impl.h
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+// Copyright 2017 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_BROWSER_MEDIA_VIDEO_SURFACE_MANAGER_IMPL_H_
+#define CONTENT_BROWSER_MEDIA_VIDEO_SURFACE_MANAGER_IMPL_H_
+
+#include <vector>
+
+#include "base/lazy_instance.h"
+#include "base/macros.h"
+#include "content/common/content_export.h"
+#include "content/public/browser/android/video_surface_manager.h"
+
+namespace content {
+
+class CONTENT_EXPORT VideoSurfaceManagerImpl :
+  NON_EXPORTED_BASE(public VideoSurfaceManager) {
+ public:
+  // Returns the VideoSurfaceManagerImpl singleton.
+  static VideoSurfaceManagerImpl* GetInstance();
+
+  // VideoSurfaceManager implementation.
+  void SetOverrideVideoSurfaceProvider(
+      VideoSurfaceProvider* provider) override;
+  void RemoveOverrideVideoSurfaceProvider(
+      VideoSurfaceProvider* provider) override;
+  VideoSurfaceProvider* GetVideoSurfaceProvider(
+      WebContents* web_contents) override;
+
+ private:
+  friend struct base::DefaultLazyInstanceTraits<VideoSurfaceManagerImpl>;
+  friend class VideoSurfaceManagerImplTest;
+
+  VideoSurfaceManagerImpl();
+  ~VideoSurfaceManagerImpl() override;
+
+  std::unique_ptr<VideoSurfaceProvider> current_provider_;
+
+  DISALLOW_COPY_AND_ASSIGN(VideoSurfaceManagerImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_MEDIA_VIDEO_SURFACE_MANAGER_IMPL_H_