Reland: Remove reference counting from media::VideoDecoder and friends.

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 926 matching lines @@
   {
     // Get an initial natural size so we have something when we signal
     // the kHaveMetadata buffering state.
     base::AutoLock l(lock_);
     natural_size_ = stream->video_decoder_config().natural_size();
   }
 
   video_renderer_ = filter_collection_->GetVideoRenderer();
   video_renderer_->Initialize(
       stream,
-      *filter_collection_->GetVideoDecoders(),
       done_cb,
       base::Bind(&Pipeline::OnUpdateStatistics, this),
       base::Bind(&Pipeline::OnVideoTimeUpdate, this),
       base::Bind(&Pipeline::OnNaturalVideoSizeChanged, this),
       base::Bind(&Pipeline::OnVideoRendererEnded, this),
       base::Bind(&Pipeline::SetError, this),
       base::Bind(&Pipeline::GetMediaTime, this),
       base::Bind(&Pipeline::GetMediaDuration, this));
-  filter_collection_->GetVideoDecoders()->clear();
 }
 
 void Pipeline::OnAudioUnderflow() {
   if (!message_loop_->BelongsToCurrentThread()) {
     message_loop_->PostTask(FROM_HERE, base::Bind(
         &Pipeline::OnAudioUnderflow, this));
     return;
   }
 
   if (state_ != kStarted)
     return;
 
   if (audio_renderer_)
     audio_renderer_->ResumeAfterUnderflow(true);
 }
 
 void Pipeline::StartClockIfWaitingForTimeUpdate_Locked() {
   lock_.AssertAcquired();
   if (!waiting_for_clock_update_)
     return;
 
   waiting_for_clock_update_ = false;
   clock_->Play();
 }
 
 }  // namespace media