Integrate Surface requests with MediaPlayerRenderer

content/browser/media/android/media_player_renderer.h

Index: content/browser/media/android/media_player_renderer.h
diff --git a/content/browser/media/android/media_player_renderer.h b/content/browser/media/android/media_player_renderer.h
index 4a95c36935da3112dbc00c41e486ee6a7d816a71..bd27299df1bd9afe748365769f8f336b04af4e8b 100644
--- a/content/browser/media/android/media_player_renderer.h
+++ b/content/browser/media/android/media_player_renderer.h
@@ -8,6 +8,7 @@
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "base/unguessable_token.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/render_frame_host.h"
 #include "media/base/android/media_player_bridge.h"
@@ -84,10 +85,24 @@ class CONTENT_EXPORT MediaPlayerRenderer : public media::Renderer,
                    base::TimeDelta duration,
                    bool has_audio) override;
 
+  // Registers a request in the content::ScopedSurfaceRequestManager, and
+  // returns the token associated to the request. The token can then be used to
+  // complete the request via the gpu::ScopedSurfaceRequestConduit.
+  // A completed request will call back to OnScopedSurfaceRequestCompleted().
+  //
+  // NOTE: If a request is already pending, calling this method again will
+  // safely cancel the pending request before registering a new one.
+  base::UnguessableToken InitiateScopedSurfaceRequest();
+  void OnScopedSurfaceRequestCompleted(gl::ScopedJavaSurface surface);
+
  private:
   // Used when creating |media_player_|.
   void OnDecoderResourcesReleased(int player_id);
 
+  // Cancels the pending request started by InitiateScopedSurfaceRequest(), if
+  // it exists. No-ops otherwise.
+  void CancelScopedSurfaceRequest();
+
   RenderFrameHost* render_frame_host_;
   media::RendererClient* renderer_client_;
 
@@ -101,6 +116,8 @@ class CONTENT_EXPORT MediaPlayerRenderer : public media::Renderer,
 
   gfx::Size video_size_;
 
+  base::UnguessableToken surface_request_token_;
+
   std::unique_ptr<media::MediaResourceGetter> media_resource_getter_;
 
   // NOTE: Weak pointers must be invalidated before all other member variables.