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

media/audio/cras/audio_manager_cras.h

Index: media/audio/cras/audio_manager_cras.h
diff --git a/media/audio/cras/audio_manager_cras.h b/media/audio/cras/audio_manager_cras.h
index a9abd6c2deb70c7b5e3858eb23b3c8fcc7ebeef5..e40f051e2b3a20223418adebd9433357c4968fc8 100644
--- a/media/audio/cras/audio_manager_cras.h
+++ b/media/audio/cras/audio_manager_cras.h
@@ -27,8 +27,6 @@ class MEDIA_EXPORT AudioManagerCras : public AudioManagerBase {
       AudioDeviceNames* device_names) OVERRIDE;
   virtual void GetAudioOutputDeviceNames(
       AudioDeviceNames* device_names) OVERRIDE;
-  virtual AudioParameters GetInputStreamParameters(
-      const std::string& device_id) OVERRIDE;
 
   // AudioManagerBase implementation.
   virtual AudioOutputStream* MakeLinearOutputStream(
@@ -49,6 +47,9 @@ class MEDIA_EXPORT AudioManagerCras : public AudioManagerBase {
   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:
   // Called by MakeLinearOutputStream and MakeLowLatencyOutputStream.