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 19efe0f1e0824458177b08c28abf10960eee30d0..0c6b7eeb4a2049282919f02813fce066786f1fc1 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);