Let Contraints Controll Mute/Unmute Audio Local Playback For Desktop Sharing

content/test/data/media/getusermedia.html

Index: content/test/data/media/getusermedia.html
diff --git a/content/test/data/media/getusermedia.html b/content/test/data/media/getusermedia.html
index f066a8a195e8741c5662ef0f622c5e94492789f8..f6b341c3ac1ac12677c63f77063b6c75d7dd283d 100644
--- a/content/test/data/media/getusermedia.html
+++ b/content/test/data/media/getusermedia.html
@@ -42,6 +42,15 @@
         failedCallback);
   }
 
+  // Requests getusermedia and expects it to succeed.
+  function getUserMediaAndExpectSuccess(constraints) {
+    console.log('Calling getUserMediaAndExpectSuccess.');
+    navigator.webkitGetUserMedia(
+        constraints,
+        reportTestSuccess,
+        failedCallback);
+  }
+
   // Requests getusermedia and expects it to fail. The error name is returned
   // to the test.
   function getUserMediaAndExpectFailure(constraints) {