Modifies AudioInputCallback::OnData and use media::AudioBus instead of plain byte vector (Relanding)

content/browser/speech/speech_recognizer_impl.h

Index: content/browser/speech/speech_recognizer_impl.h
diff --git a/content/browser/speech/speech_recognizer_impl.h b/content/browser/speech/speech_recognizer_impl.h
index abd3ab433b2ed8d5b2616495515a802c095889bc..55e07f04ef6ffe66f9169ea4f2d6086a18eb799b 100644
--- a/content/browser/speech/speech_recognizer_impl.h
+++ b/content/browser/speech/speech_recognizer_impl.h
@@ -16,6 +16,7 @@
 #include "net/url_request/url_request_context_getter.h"
 
 namespace media {
+class AudioBus;
 class AudioManager;
 }
 
@@ -132,7 +133,7 @@ class CONTENT_EXPORT SpeechRecognizerImpl
   virtual void OnError(media::AudioInputController* controller,
       media::AudioInputController::ErrorCode error_code) OVERRIDE;
   virtual void OnData(media::AudioInputController* controller,
-                      const uint8* data, uint32 size) OVERRIDE;
+                      const media::AudioBus* data) OVERRIDE;
   virtual void OnLog(media::AudioInputController* controller,
                      const std::string& message) OVERRIDE {}