Don't run WSOLA over always muted channels.

media/cast/test/fake_media_source.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/cast/test/fake_media_source.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/files/scoped_file.h"
@@ skipping 233 matching lines @@
   if (!is_transcoding_audio() && !is_transcoding_video()) {
     // Send fake patterns.
     task_runner_->PostTask(
         FROM_HERE,
         base::Bind(&FakeMediaSource::SendNextFakeFrame,
                    weak_factory_.GetWeakPtr()));
     return;
   }
 
   // Send transcoding streams.
-  audio_algo_.Initialize(source_audio_params_);
+  audio_algo_.Initialize(source_audio_params_, std::vector<bool>());
   audio_algo_.FlushBuffers();
   audio_fifo_input_bus_ = AudioBus::Create(
       source_audio_params_.channels(),
       source_audio_params_.frames_per_buffer());
   // Audio FIFO can carry all data fron AudioRendererAlgorithm.
   audio_fifo_.reset(
       new AudioFifo(source_audio_params_.channels(),
                     audio_algo_.QueueCapacity()));
   audio_converter_.reset(new media::AudioConverter(
       source_audio_params_, output_audio_params_, true));
@@ skipping 356 matching lines @@
 AVStream* FakeMediaSource::av_audio_stream() {
   return av_format_context_->streams[audio_stream_index_];
 }
 
 AVStream* FakeMediaSource::av_video_stream() {
   return av_format_context_->streams[video_stream_index_];
 }
 
 }  // namespace cast
 }  // namespace media