Revert of Allow muting/unmuting audio through media track API

media/base/pipeline_impl.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_impl.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 186 matching lines @@
   return statistics_;
 }
 
 void PipelineImpl::SetCdm(CdmContext* cdm_context,
                           const CdmAttachedCB& cdm_attached_cb) {
   task_runner_->PostTask(
       FROM_HERE, base::Bind(&PipelineImpl::SetCdmTask, weak_this_, cdm_context,
                             cdm_attached_cb));
 }
 
-void PipelineImpl::OnEnabledAudioStreamsChanged(
-    const std::vector<const DemuxerStream*>& enabledAudioStreams) {
-  if (!task_runner_->BelongsToCurrentThread()) {
-    task_runner_->PostTask(
-        FROM_HERE, base::Bind(&PipelineImpl::OnEnabledAudioStreamsChanged,
-                              weak_factory_.GetWeakPtr(), enabledAudioStreams));
-    return;
-  }
-  base::AutoLock auto_lock(lock_);
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  if (renderer_) {
-    renderer_->OnEnabledAudioStreamsChanged(enabledAudioStreams);
-  }
-}
-
-void PipelineImpl::OnSelectedVideoStreamChanged(
-    const DemuxerStream* selectedVideoStream) {
-  if (!task_runner_->BelongsToCurrentThread()) {
-    task_runner_->PostTask(
-        FROM_HERE, base::Bind(&PipelineImpl::OnSelectedVideoStreamChanged,
-                              weak_factory_.GetWeakPtr(), selectedVideoStream));
-    return;
-  }
-  base::AutoLock auto_lock(lock_);
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  if (renderer_) {
-    renderer_->OnSelectedVideoStreamChanged(selectedVideoStream);
-  }
-}
-
 void PipelineImpl::SetErrorForTesting(PipelineStatus status) {
   OnError(status);
 }
 
 bool PipelineImpl::HasWeakPtrsForTesting() const {
   DCHECK(task_runner_->BelongsToCurrentThread());
   return weak_factory_.HasWeakPtrs();
 }
 
 void PipelineImpl::SetState(State next_state) {
@@ skipping 646 matching lines @@
   metadata_cb_.Run(metadata);
 }
 
 void PipelineImpl::BufferingStateChanged(BufferingState new_buffering_state) {
   DVLOG(1) << __FUNCTION__ << "(" << new_buffering_state << ") ";
   DCHECK(task_runner_->BelongsToCurrentThread());
   buffering_state_cb_.Run(new_buffering_state);
 }
 
 }  // namespace media