Refactor AudioInputController and split stat by stream type.

content/browser/speech/speech_recognizer_impl.cc

Index: content/browser/speech/speech_recognizer_impl.cc
diff --git a/content/browser/speech/speech_recognizer_impl.cc b/content/browser/speech/speech_recognizer_impl.cc
index d79c17113f2bcb22f5afd3969fd82a66854630bb..8a57992e749c026611e93f4186859bb86e50f020 100644
--- a/content/browser/speech/speech_recognizer_impl.cc
+++ b/content/browser/speech/speech_recognizer_impl.cc
@@ -6,6 +6,8 @@
 
 #include <stdint.h>
 
+#include <algorithm>
+
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/time/time.h"
@@ -14,6 +16,7 @@
 #include "content/browser/media/media_internals.h"
 #include "content/browser/speech/audio_buffer.h"
 #include "content/public/browser/speech_recognition_event_listener.h"
+#include "media/audio/audio_file_writer.h"
 #include "media/base/audio_converter.h"
 
 #if defined(OS_WIN)
@@ -589,7 +592,8 @@ SpeechRecognizerImpl::StartRecording(const FSMEventArgs&) {
       new OnDataConverter(input_parameters, output_parameters));
 
   audio_controller_ = AudioInputController::Create(
-      audio_manager, this, this, input_parameters, device_id_, NULL);
+      audio_manager, this, this, nullptr, nullptr, input_parameters, device_id_,
+      /*agc_is_enabled*/ false);
 
   if (!audio_controller_.get()) {
     return Abort(