Fix chromeos=1 so Pulse is preferred when use_cras=0.

media/audio/cras/audio_manager_cras.h

 // 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.
 
 #ifndef MEDIA_AUDIO_CRAS_AUDIO_MANAGER_CRAS_H_
 #define MEDIA_AUDIO_CRAS_AUDIO_MANAGER_CRAS_H_
 
+#include <cras_types.h>
+
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "media/audio/audio_manager_base.h"
 
 namespace media {
 
 class MEDIA_EXPORT AudioManagerCras : public AudioManagerBase {
  public:
@@ skipping 15 matching lines @@
       const AudioParameters& params) OVERRIDE;
   virtual AudioOutputStream* MakeLowLatencyOutputStream(
       const AudioParameters& params,
       const std::string& device_id,
       const std::string& input_device_id) OVERRIDE;
   virtual AudioInputStream* MakeLinearInputStream(
       const AudioParameters& params, const std::string& device_id) OVERRIDE;
   virtual AudioInputStream* MakeLowLatencyInputStream(
       const AudioParameters& params, const std::string& device_id) OVERRIDE;
 
+  static snd_pcm_format_t BitsToFormat(int bits_per_sample);
+
  protected:
   virtual ~AudioManagerCras();
 
   virtual AudioParameters GetPreferredOutputStreamParameters(
       const std::string& output_device_id,
       const AudioParameters& input_params) OVERRIDE;
 
  private:
   // Called by MakeLinearOutputStream and MakeLowLatencyOutputStream.
   AudioOutputStream* MakeOutputStream(const AudioParameters& params);
 
   // Called by MakeLinearInputStream and MakeLowLatencyInputStream.
   AudioInputStream* MakeInputStream(const AudioParameters& params,
                                     const std::string& device_id);
 
   DISALLOW_COPY_AND_ASSIGN(AudioManagerCras);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_CRAS_AUDIO_MANAGER_CRAS_H_