Reland 15721002: Hook up the device selection to the WebAudio live audio

content/renderer/media/media_stream_impl.cc

Index: content/renderer/media/media_stream_impl.cc
diff --git a/content/renderer/media/media_stream_impl.cc b/content/renderer/media/media_stream_impl.cc
index 20277b8dc7bd1a7d8c721780efe4ae55aca8006f..08d4edf222ed312a538a618dedb913d4deef0a50 100644
--- a/content/renderer/media/media_stream_impl.cc
+++ b/content/renderer/media/media_stream_impl.cc
@@ -91,7 +91,8 @@ void CreateWebKitSourceVector(
           UTF8ToUTF16(devices[i].device.name));
     webkit_sources[i].setExtraData(
         new content::MediaStreamSourceExtraData(devices[i], webkit_sources[i]));
-    webkit_sources[i].setDeviceId(UTF8ToUTF16(devices[i].device.id.c_str()));
+    webkit_sources[i].setDeviceId(UTF8ToUTF16(
+        base::IntToString(devices[i].session_id)));
   }
 }