add audio-buffer-size command line flag support to the input audio for all the platforms

media/audio/alsa/audio_manager_alsa.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_ALSA_AUDIO_MANAGER_ALSA_H_
 #define MEDIA_AUDIO_ALSA_AUDIO_MANAGER_ALSA_H_
 
 #include <string>
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
@@ skipping 11 matching lines @@
   static void ShowLinuxAudioInputSettings();
 
   // Implementation of AudioManager.
   virtual bool HasAudioOutputDevices() OVERRIDE;
   virtual bool HasAudioInputDevices() OVERRIDE;
   virtual void ShowAudioInputSettings() OVERRIDE;
   virtual void GetAudioInputDeviceNames(
       AudioDeviceNames* device_names) OVERRIDE;
   virtual void GetAudioOutputDeviceNames(
       AudioDeviceNames* device_names) OVERRIDE;
-  virtual AudioParameters GetInputStreamParameters(
-      const std::string& device_id) OVERRIDE;
 
   // Implementation of AudioManagerBase.
   virtual AudioOutputStream* MakeLinearOutputStream(
       const AudioParameters& params) OVERRIDE;
   virtual AudioOutputStream* MakeLowLatencyOutputStream(
       const AudioParameters& params,
       const std::string& 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;
 
  protected:
   virtual ~AudioManagerAlsa();
 
   virtual AudioParameters GetPreferredOutputStreamParameters(
       const std::string& output_device_id,
       const AudioParameters& input_params) OVERRIDE;
+  virtual AudioParameters GetPreferredInputStreamParameters(
+      const std::string& input_device_id,
+      const AudioParameters& input_params) OVERRIDE;
 
  private:
   enum StreamType {
     kStreamPlayback = 0,
     kStreamCapture,
   };
 
   // Gets a list of available ALSA devices.
   void GetAlsaAudioDevices(StreamType type,
                            media::AudioDeviceNames* device_names);
@@ skipping 22 matching lines @@
                                     const std::string& device_id);
 
   scoped_ptr<AlsaWrapper> wrapper_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioManagerAlsa);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_ALSA_AUDIO_MANAGER_ALSA_H_