Require Renderer::Initialize() to return a status code via callback.

media/mojo/services/mojo_renderer_service.h

Index: media/mojo/services/mojo_renderer_service.h
diff --git a/media/mojo/services/mojo_renderer_service.h b/media/mojo/services/mojo_renderer_service.h
index 7ad544b2ea1ae0f0c5a05e0f28effe75afc3c4b5..7eda1c45e6483c4a2b6d0b5502b00504415b02f2 100644
--- a/media/mojo/services/mojo_renderer_service.h
+++ b/media/mojo/services/mojo_renderer_service.h
@@ -57,7 +57,8 @@ class MojoRendererService : public mojo::InterfaceImpl<mojo::MediaRenderer> {
   void OnStreamReady(const mojo::Closure& callback);
 
   // Called when |audio_renderer_| initialization has completed.
-  void OnRendererInitializeDone(const mojo::Closure& callback);
+  void OnRendererInitializeDone(const mojo::Closure& callback,
+                                PipelineStatus status);
 
   // Callback executed by filters to update statistics.
   void OnUpdateStatistics(const PipelineStatistics& stats);