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

media/audio/mac/audio_manager_mac.h

Index: media/audio/mac/audio_manager_mac.h
diff --git a/media/audio/mac/audio_manager_mac.h b/media/audio/mac/audio_manager_mac.h
index 490b0b6bbdddecaf20c69f6ad5088d41ff3664ab..613558684e0c2223781a87c147e6739f3fd5f9d9 100644
--- a/media/audio/mac/audio_manager_mac.h
+++ b/media/audio/mac/audio_manager_mac.h
@@ -30,8 +30,6 @@ class MEDIA_EXPORT AudioManagerMac : public AudioManagerBase {
       AudioDeviceNames* device_names) OVERRIDE;
   virtual void GetAudioOutputDeviceNames(
       AudioDeviceNames* device_names) OVERRIDE;
-  virtual AudioParameters GetInputStreamParameters(
-      const std::string& device_id) OVERRIDE;
   virtual std::string GetAssociatedOutputDeviceID(
       const std::string& input_device_id) OVERRIDE;
 
@@ -81,6 +79,9 @@ class MEDIA_EXPORT AudioManagerMac : 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:
   void InitializeOnAudioThread();