Update MediaKeySession events to match latest EME spec

LayoutTests/media/encrypted-media/encrypted-media-v2-events.html

Index: LayoutTests/media/encrypted-media/encrypted-media-v2-events.html
diff --git a/LayoutTests/media/encrypted-media/encrypted-media-v2-events.html b/LayoutTests/media/encrypted-media/encrypted-media-v2-events.html
index 1e03e64c516151e122ba9b7ee288cdf779087f70..3b844e9f67771e7c13c55d2cd84dfe5946908a3d 100644
--- a/LayoutTests/media/encrypted-media/encrypted-media-v2-events.html
+++ b/LayoutTests/media/encrypted-media/encrypted-media-v2-events.html
@@ -23,17 +23,17 @@
             {
                 run('mediaKeys = new MediaKeys("org.w3.clearkey")');
                 run('mediaKeySession = mediaKeys.createSession("video/webm", initData)');
-                waitForEvent('webkitkeymessage', keyMessage, false, false, mediaKeySession);
-                waitForEvent('webkitkeyerror', keyError, false, false, mediaKeySession);
-                waitForEvent('webkitkeyadded', null, true, false, mediaKeySession);
+                waitForEvent('message', processMessage, false, false, mediaKeySession);
+                waitForEvent('error', processError, false, false, mediaKeySession);
+                waitForEvent('ready', null, true, false, mediaKeySession);
             }
 
-            function keyMessage(event)
+            function processMessage(event)
             {
                 run('mediaKeySession.update(invalidKey)');
             }
 
-            function keyError(event)
+            function processError(event)
             {
                 run('mediaKeySession.update(validKey)');
             }