Use GVR async reprojection video surface for fullscreen in VR shell

content/public/browser/android/video_surface_provider.h

+// 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_PUBLIC_BROWSER_ANDROID_VIDEO_SURFACE_PROVIDER_H_
+#define CONTENT_PUBLIC_BROWSER_ANDROID_VIDEO_SURFACE_PROVIDER_H_
+
+#include "content/common/content_export.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/gl/android/scoped_java_surface.h"
+
+namespace content {
+
+class CONTENT_EXPORT VideoSurfaceProvider {
+ public:
+  class Client {
+   public:
+    // For receiving notififcations when the surface is created and
+    // destroyed. When |surface.IsEmpty()| the surface was destroyed and
+    // the client should not hold any references to it once this returns.
+    virtual void SetVideoSurface(gl::ScopedJavaSurface surface) = 0;
+
+    // Called after the video surface has been hidden because we're exiting
+    // fullscreen.
+    virtual void DidExitFullscreen(bool release_media_player) = 0;
+
+   protected:
+    Client() {}
+    ~Client() {}
+
+    DISALLOW_COPY_AND_ASSIGN(Client);
+  };
+
+  // Update the video size.
+  virtual void OnVideoSizeChanged(int width, int height) = 0;
+
+  // Create the video surface and call back to the client when done.
+  virtual void CreateVideoSurface(Client* client,
+                                  const gfx::Size& video_natural_size) = 0;
+  VideoSurfaceProvider() {}
+  ~VideoSurfaceProvider() {}
+
+  DISALLOW_COPY_AND_ASSIGN(VideoSurfaceProvider);
+
+};
+
+}  // namespace content
+#endif // CONTENT_PUBLIC_BROWSER_ANDROID_VIDEO_SURFACE_PROVIDER_H_