Update EME browser tests to include EME WD

chrome/test/data/media/encrypted_media_player.html

Index: chrome/test/data/media/encrypted_media_player.html
diff --git a/chrome/test/data/media/encrypted_media_player.html b/chrome/test/data/media/encrypted_media_player.html
index abe085d98c89c5dbb19dbef62c09596d8fa5992a..f65a837a967e4f67445d4b2945b1c478966f9805 100644
--- a/chrome/test/data/media/encrypted_media_player.html
+++ b/chrome/test/data/media/encrypted_media_player.html
@@ -10,6 +10,7 @@
     <script src="encrypted_media_utils.js" type="text/javascript"></script>
     <script type="text/javascript">
       var video = document.querySelector('video');
+      var usePrefixedEME = QueryString.usePrefixedEME == 1;
 
       function onTimeUpdate() {
         if (video.currentTime < 1)
@@ -20,7 +21,7 @@
         if (!sessionToLoad) {
           // keyadded may be fired around the start of playback; check for it
           // after a delay to avoid timing issues.
-          if (!video.receivedKeyAdded)
+          if (usePrefixedEME && !video.receivedKeyAdded)
             failTest('Key added event not received.');
           if (video.isHeartbeatExpected && !video.receivedHeartbeat)
             failTest('Heartbeat keymessage event not received.');