Update EME browser tests to include EME WD

chrome/test/data/media/mse_config_change.html

Index: chrome/test/data/media/mse_config_change.html
diff --git a/chrome/test/data/media/mse_config_change.html b/chrome/test/data/media/mse_config_change.html
index 96cbbabd9c4c9791fe823eda6d610d171f821431..f5cdd7b102ad37ef778691adfa0b54459830b20a 100644
--- a/chrome/test/data/media/mse_config_change.html
+++ b/chrome/test/data/media/mse_config_change.html
@@ -9,6 +9,7 @@
     <script src="encrypted_media_utils.js" type="text/javascript"></script>
     <script type="text/javascript">
       var runEncrypted = QueryString.runEncrypted == 1;
+      var usePrefixedEME = QueryString.usePrefixedEME == 1;
       var video = document.querySelector('video');
       var mediaType = 'video/webm; codecs="vorbis, vp8"';
 
@@ -120,7 +121,7 @@
         video.addEventListener('ended', failTest);
         if (runEncrypted) {
           loadEncryptedMedia(video, MEDIA_1, keySystem, KEY, true,
-                             appendNextSource);
+                             usePrefixedEME, appendNextSource);
         } else {
           var mediaSource = loadMediaSource(MEDIA_1, mediaType,
                                             appendNextSource);