Set keyboard mic effect if available.

media/audio/audio_manager.h

Index: media/audio/audio_manager.h
diff --git a/media/audio/audio_manager.h b/media/audio/audio_manager.h
index 915308ef77d89cfea1470ee0b1696d44b5b94e12..7705cdb804ee516b254beb0fe8d35d51a61f738c 100644
--- a/media/audio/audio_manager.h
+++ b/media/audio/audio_manager.h
@@ -177,6 +177,11 @@ class MEDIA_EXPORT AudioManager {
   virtual scoped_ptr<AudioLog> CreateAudioLog(
       AudioLogFactory::AudioComponent component) = 0;
 
+  // Informs the audio manager that the system has support for a keyboard mic.
+  // This information will be passed on in the return value of
+  // GetInputStreamParameters as an effect. Only supported on ChromeOS.
+  virtual void SetHasKeyboardMic() = 0;
+
  protected:
   AudioManager();