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

media/mojo/services/mojo_renderer_impl.h

 // Copyright 2014 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 MEDIA_MOJO_SERVICES_MOJO_RENDERER_IMPL_H_
 #define MEDIA_MOJO_SERVICES_MOJO_RENDERER_IMPL_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "media/base/renderer.h"
@@ skipping 16 matching lines @@
 class MojoRendererImpl : public Renderer, public mojo::MediaRendererClient {
  public:
   // |task_runner| is the TaskRunner on which all methods are invoked.
   MojoRendererImpl(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
       mojo::MediaRendererPtr remote_media_renderer);
   ~MojoRendererImpl() override;
 
   // Renderer implementation.
   void Initialize(DemuxerStreamProvider* demuxer_stream_provider,
-                  const base::Closure& init_cb,
+                  const PipelineStatusCB& init_cb,
                   const StatisticsCB& statistics_cb,
                   const BufferingStateCB& buffering_state_cb,
                   const PaintCB& paint_cb,
                   const base::Closure& ended_cb,
                   const PipelineStatusCB& error_cb) override;
   void SetCdm(CdmContext* cdm_context,
               const CdmAttachedCB& cdm_attached_cb) override;
   void Flush(const base::Closure& flush_cb) override;
   void StartPlayingFrom(base::TimeDelta time) override;
   void SetPlaybackRate(float playback_rate) override;
@@ skipping 19 matching lines @@
   mojo::MediaRendererPtr remote_media_renderer_;
 
   // Store a handle to the mojo message pipe. This object
   // temporary and is used as a springboard so that the
   // |remote_media_renderer_| can be constructed on the
   // correct thread.
   mojo::ScopedMessagePipeHandle remote_media_renderer_pipe_;
 
   // Callbacks passed to Initialize() that we forward messages from
   // |remote_media_renderer_| through.
-  base::Closure init_cb_;
+  PipelineStatusCB init_cb_;
   base::Closure ended_cb_;
   PipelineStatusCB error_cb_;
   BufferingStateCB buffering_state_cb_;
 
   // Lock used to serialize access for the following data members.
   mutable base::Lock lock_;
 
   base::TimeDelta time_;
   // TODO(xhwang): It seems we don't need |max_time_| now. Drop it!
   base::TimeDelta max_time_;
 
   base::WeakPtrFactory<MojoRendererImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MojoRendererImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MOJO_SERVICES_MOJO_RENDERER_IMPL_H_