Add a noise indicator to the speech bubble volume indicator.

chrome/browser/speech/speech_input_bubble_controller.h

Index: chrome/browser/speech/speech_input_bubble_controller.h
diff --git a/chrome/browser/speech/speech_input_bubble_controller.h b/chrome/browser/speech/speech_input_bubble_controller.h
index 04c92b557f1559cee4025114a71f11aba96ffd76..cdfe5c3c957996e4d1cd6ade4536ed471b0273a2 100644
--- a/chrome/browser/speech/speech_input_bubble_controller.h
+++ b/chrome/browser/speech/speech_input_bubble_controller.h
@@ -68,7 +68,7 @@ class SpeechInputBubbleController
   void SetBubbleMessage(int caller_id, const string16& text);
 
   // Updates the current captured audio volume displayed on screen.
-  void SetBubbleInputVolume(int caller_id, float volume);
+  void SetBubbleInputVolume(int caller_id, float volume, float noise_volume);
 
   void CloseBubble(int caller_id);
 
@@ -102,7 +102,8 @@ class SpeechInputBubbleController
   void ProcessRequestInUiThread(int caller_id,
                                 RequestType type,
                                 const string16& text,
-                                float volume);
+                                float volume,
+                                float noise_volume);
 
   // Called whenever a bubble was added to or removed from the list. If the
   // bubble was being added, this method registers for close notifications with