Rename onneedkey event to onencrypted.

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

Index: LayoutTests/media/encrypted-media/prefixed/encrypted-media-events.html
diff --git a/LayoutTests/media/encrypted-media/prefixed/encrypted-media-events.html b/LayoutTests/media/encrypted-media/prefixed/encrypted-media-events.html
index a86f67c43e91db73c6dbd135b2b56ee976edd20a..a233c12a2c90700b1a3d41f823b104bb32cb5353 100644
--- a/LayoutTests/media/encrypted-media/prefixed/encrypted-media-events.html
+++ b/LayoutTests/media/encrypted-media/prefixed/encrypted-media-events.html
@@ -14,9 +14,9 @@
             var messageEvent = document.createEvent("MediaKeyMessageEvent");
             testExpected("messageEvent", null, "!=");
             testExpected("messageEvent instanceof window.MediaKeyMessageEvent", true);
-            var keyNeededEvent = document.createEvent("MediaKeyNeededEvent");
+            var keyNeededEvent = document.createEvent("MediaKeyEvent");

[wolenetz, 2014/10/02 00:15:20]

nit: this seems more than just a rename, and it appears this change impacts
prefixed API. Is this intended?

[wolenetz, 2014/10/02 18:11:34]

I received clarification from sandersd@ that this test was previously wrong
(testing the unprefixed, not prefixed API), and this portion of the CL fixes
that to test the prefixed API. No visible API change to prefixed API is intended
to be included in this CL.

             testExpected("keyNeededEvent", null, "!=");
-            testExpected("keyNeededEvent instanceof window.MediaKeyNeededEvent", true);
+            testExpected("keyNeededEvent instanceof window.MediaKeyEvent", true);
 
             // Next, The test runs twice, once using on* and then using addEventListener().
             var isFirstRun = true;