Replace init_cb in Renderer::Initialize() with base::Closure.

media/base/pipeline.cc

 // Copyright (c) 2012 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/base/pipeline.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 319 matching lines @@
   PipelineStatusCB done_cb =
       base::Bind(&Pipeline::OnStateTransition, weak_factory_.GetWeakPtr());
 
   // Switch states, performing any entrance actions for the new state as well.
   SetState(GetNextState());
   switch (state_) {
     case kInitDemuxer:
       return InitializeDemuxer(done_cb);
 
     case kInitRenderer:
-      return InitializeRenderer(done_cb);
+      return InitializeRenderer(base::Bind(done_cb, PIPELINE_OK));
 
     case kPlaying:
       // Report metadata the first time we enter the playing state.
       if (!is_initialized_) {
         is_initialized_ = true;
         ReportMetadata();
       }
 
       base::ResetAndReturn(&seek_cb_).Run(PIPELINE_OK);
 
@@ skipping 307 matching lines @@
                               const AddTextTrackDoneCB& done_cb) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   add_text_track_cb_.Run(config, done_cb);
 }
 
 void Pipeline::InitializeDemuxer(const PipelineStatusCB& done_cb) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   demuxer_->Initialize(this, done_cb, text_renderer_);
 }
 
-void Pipeline::InitializeRenderer(const PipelineStatusCB& done_cb) {
+void Pipeline::InitializeRenderer(const base::Closure& done_cb) {
   DCHECK(task_runner_->BelongsToCurrentThread());
 
   if (!demuxer_->GetStream(DemuxerStream::AUDIO) &&
       !demuxer_->GetStream(DemuxerStream::VIDEO)) {
     renderer_.reset();
-    task_runner_->PostTask(
-        FROM_HERE, base::Bind(done_cb, PIPELINE_ERROR_COULD_NOT_RENDER));
+    OnError(PIPELINE_ERROR_COULD_NOT_RENDER);
     return;
   }
 
   base::WeakPtr<Pipeline> weak_this = weak_factory_.GetWeakPtr();
   renderer_->Initialize(
       done_cb,
       base::Bind(&Pipeline::OnUpdateStatistics, weak_this),
       base::Bind(&Pipeline::OnRendererEnded, weak_this),
       base::Bind(&Pipeline::OnError, weak_this),
       base::Bind(&Pipeline::BufferingStateChanged, weak_this),
@@ skipping 14 matching lines @@
   metadata_cb_.Run(metadata);
 }
 
 void Pipeline::BufferingStateChanged(BufferingState new_buffering_state) {
   DVLOG(1) << __FUNCTION__ << "(" << new_buffering_state << ") ";
   DCHECK(task_runner_->BelongsToCurrentThread());
   buffering_state_cb_.Run(new_buffering_state);
 }
 
 }  // namespace media