Add a unified audio I/O backend for ChromeOS.

media/audio/cras/audio_manager_cras.cc

 // Copyright 2013 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/audio/cras/audio_manager_cras.h"
 
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/logging.h"
 #include "base/nix/xdg_util.h"
 #include "base/process_util.h"
 #include "base/stl_util.h"
 #include "media/audio/audio_util.h"
 #include "media/audio/cras/cras_input.h"
-#include "media/audio/cras/cras_output.h"
+#include "media/audio/cras/cras_unified.h"
 #include "media/base/channel_layout.h"
 
 namespace media {
 
 // Maximum number of output streams that can be open simultaneously.
 static const int kMaxOutputStreams = 50;
 
 // Default sample rate for input and output streams.
 static const int kDefaultSampleRate = 48000;
 
@@ skipping 88 matching lines @@
   if (user_buffer_size)
     buffer_size = user_buffer_size;
 
   return AudioParameters(
       AudioParameters::AUDIO_PCM_LOW_LATENCY, channel_layout, input_channels,
       sample_rate, bits_per_sample, buffer_size);
 }
 
 AudioOutputStream* AudioManagerCras::MakeOutputStream(
     const AudioParameters& params) {
-  return new CrasOutputStream(params, this);
+  return new CrasUnifiedStream(params, this);
 }
 
 AudioInputStream* AudioManagerCras::MakeInputStream(
     const AudioParameters& params, const std::string& device_id) {
   return new CrasInputStream(params, this);
 }
 
 }  // namespace media