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

media/audio/fake_audio_manager.h

Index: media/audio/fake_audio_manager.h
diff --git a/media/audio/fake_audio_manager.h b/media/audio/fake_audio_manager.h
index 9fbf140c6c0342442a09156ac1c6b68140cbd7de..23ba8cec1f7fd4040b92fd7060f1ed83d955bd7e 100644
--- a/media/audio/fake_audio_manager.h
+++ b/media/audio/fake_audio_manager.h
@@ -33,8 +33,6 @@ class MEDIA_EXPORT FakeAudioManager : public AudioManagerBase {
   virtual AudioInputStream* MakeLowLatencyInputStream(
       const AudioParameters& params,
       const std::string& device_id) OVERRIDE;
-  virtual AudioParameters GetInputStreamParameters(
-      const std::string& device_id) OVERRIDE;
 
  protected:
   virtual ~FakeAudioManager();
@@ -43,6 +41,11 @@ class MEDIA_EXPORT FakeAudioManager : public AudioManagerBase {
       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:
   DISALLOW_COPY_AND_ASSIGN(FakeAudioManager);
 };