Revert of MediaStream audio object graph untangling and clean-ups.

content/renderer/media/rtc_peer_connection_handler_unittest.cc

Index: content/renderer/media/rtc_peer_connection_handler_unittest.cc
diff --git a/content/renderer/media/rtc_peer_connection_handler_unittest.cc b/content/renderer/media/rtc_peer_connection_handler_unittest.cc
index f1ae3de47eb7bc9df75fd9e80fd0fdbd73d1a0c1..0ac11d6c7d5a31e9f15f52e3caceba61a3085594 100644
--- a/content/renderer/media/rtc_peer_connection_handler_unittest.cc
+++ b/content/renderer/media/rtc_peer_connection_handler_unittest.cc
@@ -20,6 +20,7 @@
 #include "content/renderer/media/media_stream_source.h"
 #include "content/renderer/media/media_stream_video_track.h"
 #include "content/renderer/media/mock_data_channel_impl.h"
+#include "content/renderer/media/mock_media_constraint_factory.h"
 #include "content/renderer/media/mock_media_stream_video_source.h"
 #include "content/renderer/media/mock_peer_connection_impl.h"
 #include "content/renderer/media/mock_web_rtc_peer_connection_handler_client.h"
@@ -267,10 +268,18 @@
     blink::WebVector<blink::WebMediaStreamTrack> audio_tracks(
         static_cast<size_t>(1));
     audio_tracks[0].initialize(audio_source.id(), audio_source);
+    StreamDeviceInfo device_info(MEDIA_DEVICE_AUDIO_CAPTURE, "Mock device",
+                                 "mock_device_id");
+    MockMediaConstraintFactory constraint_factory;
+    const blink::WebMediaConstraints constraints =
+        constraint_factory.CreateWebMediaConstraints();
+    scoped_refptr<WebRtcAudioCapturer> capturer(
+        WebRtcAudioCapturer::CreateCapturer(-1, device_info, constraints,
+                                            nullptr, nullptr));
     scoped_refptr<WebRtcLocalAudioTrackAdapter> adapter(
         WebRtcLocalAudioTrackAdapter::Create(audio_track_label, nullptr));
     scoped_ptr<WebRtcLocalAudioTrack> native_track(
-        new WebRtcLocalAudioTrack(adapter.get()));
+        new WebRtcLocalAudioTrack(adapter.get(), capturer, nullptr));
     audio_tracks[0].setExtraData(native_track.release());
     blink::WebVector<blink::WebMediaStreamTrack> video_tracks(
         static_cast<size_t>(1));
@@ -512,7 +521,8 @@
   blink::WebVector<blink::WebMediaStreamTrack> audio_tracks;
   local_stream.audioTracks(audio_tracks);
   MediaStreamAudioSource* native_audio_source =
-      MediaStreamAudioSource::From(audio_tracks[0].source());
+      static_cast<MediaStreamAudioSource*>(
+          audio_tracks[0].source().getExtraData());
   native_audio_source->StopSource();
 
   blink::WebVector<blink::WebMediaStreamTrack> video_tracks;