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

media/mojo/services/mojo_renderer_impl.cc

 // 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.
 
 #include "media/mojo/services/mojo_renderer_impl.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 17 matching lines @@
 
 MojoRendererImpl::~MojoRendererImpl() {
   DVLOG(1) << __FUNCTION__;
   DCHECK(task_runner_->BelongsToCurrentThread());
   // Connection to |remote_media_renderer_| will error-out here.
 }
 
 // TODO(xhwang): Support |paint_cb| if needed.
 void MojoRendererImpl::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) {
   DVLOG(1) << __FUNCTION__;
   DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK(demuxer_stream_provider);
 
   // Bind the mojo InterfacePtr to the message pipe on the
@@ skipping 146 matching lines @@
         FROM_HERE,
         base::Bind(&MojoRendererImpl::OnError, weak_factory_.GetWeakPtr()));
     return;
   }
 
   // TODO(tim): Should we plumb error code from remote renderer?
   // http://crbug.com/410451.
   if (init_cb_.is_null())  // We have initialized already.
     error_cb_.Run(PIPELINE_ERROR_DECODE);
   else
-    error_cb_.Run(PIPELINE_ERROR_COULD_NOT_RENDER);
+    init_cb_.Run(PIPELINE_ERROR_COULD_NOT_RENDER);
 }
 
 void MojoRendererImpl::OnInitialized() {
   DVLOG(1) << __FUNCTION__;
   DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK(!init_cb_.is_null());
-
-  base::ResetAndReturn(&init_cb_).Run();
+  if (!init_cb_.is_null())
+    base::ResetAndReturn(&init_cb_).Run(PIPELINE_OK);
 }
 
 }  // namespace media