Stop media stream source when audio capture error occurs.

content/renderer/media/speech_recognition_audio_sink_unittest.cc

Index: content/renderer/media/speech_recognition_audio_sink_unittest.cc
diff --git a/content/renderer/media/speech_recognition_audio_sink_unittest.cc b/content/renderer/media/speech_recognition_audio_sink_unittest.cc
index 47639a50febdcd4c9e1658fbce6c55c0115028ca..9186109255a7b3650b1f21549323972ae1ff0a65 100644
--- a/content/renderer/media/speech_recognition_audio_sink_unittest.cc
+++ b/content/renderer/media/speech_recognition_audio_sink_unittest.cc
@@ -11,6 +11,7 @@
 
 #include "base/bind.h"
 #include "base/macros.h"
+#include "base/message_loop/message_loop.h"
 #include "content/renderer/media/media_stream_audio_source.h"
 #include "content/renderer/media/media_stream_audio_track.h"
 #include "content/renderer/media/webrtc/mock_peer_connection_dependency_factory.h"
@@ -387,6 +388,8 @@ class SpeechRecognitionAudioSinkTest : public testing::Test {
   base::TimeTicks first_frame_capture_time_;
   int64_t sample_frames_captured_;
 
+  base::MessageLoop message_loop_;
+
   DISALLOW_COPY_AND_ASSIGN(SpeechRecognitionAudioSinkTest);
 };