Decouple c/b/cros/audio from c/b/speech.

chrome/browser/chromeos/audio/audio_mixer_alsa.h

Index: chrome/browser/chromeos/audio/audio_mixer_alsa.h
diff --git a/chrome/browser/chromeos/audio/audio_mixer_alsa.h b/chrome/browser/chromeos/audio/audio_mixer_alsa.h
index c954d2ef3b258ac96ac00c0dd9207c54bffb59da..204b6d1ed132821e88335436bc476ff1bd4eb4ac 100644
--- a/chrome/browser/chromeos/audio/audio_mixer_alsa.h
+++ b/chrome/browser/chromeos/audio/audio_mixer_alsa.h
@@ -28,7 +28,7 @@ class AudioMixerAlsa : public AudioMixer {
   virtual ~AudioMixerAlsa();
 
   // AudioMixer implementation.
-  virtual void Init() OVERRIDE;
+  virtual void Init(const base::Closure& on_connected) OVERRIDE;
   virtual double GetVolumePercent() OVERRIDE;
   virtual void SetVolumePercent(double percent) OVERRIDE;
   virtual bool IsMuted() OVERRIDE;
@@ -43,12 +43,12 @@ class AudioMixerAlsa : public AudioMixer {
  private:
   // Tries to connect to ALSA.  On failure, posts a delayed Connect() task to
   // try again.
-  void Connect();
+  void Connect(const base::Closure& on_connected);
 
   // Helper method called by Connect().  On success, initializes
   // |min_volume_db_|, |max_volume_db_|, |alsa_mixer_|, and |element_*| and
   // returns true.
-  bool ConnectInternal();
+  bool ConnectInternal(const base::Closure& on_connected);
 
   // Disconnects from ALSA if currently connected and signals
   // |disconnected_event_|.