Integrate Surface requests with MediaPlayerRenderer

media/mojo/interfaces/renderer.mojom

Index: media/mojo/interfaces/renderer.mojom
diff --git a/media/mojo/interfaces/renderer.mojom b/media/mojo/interfaces/renderer.mojom
index e290ed4c15b4b1c8721d27f67485b41773b07678..87e2f0dcba1a5b5e440c6d527157343207ac9f36 100644
--- a/media/mojo/interfaces/renderer.mojom
+++ b/media/mojo/interfaces/renderer.mojom
@@ -35,6 +35,10 @@ interface Renderer {
   // Attaches the CDM associated with |cdm_id| to the renderer service,
   // executing the callback with whether the CDM was successfully attached.
   SetCdm(int32 cdm_id) => (bool success);
+
+  // Registers a new request in the ScopedSurfaceRequestManager, and returns
+  // its token.
+  InitiateScopedSurfaceRequest() => (bool success, uint64 request_token);
 };
 
 interface RendererClient {