Indexed DB: Remove vendor prefix removal from tests

LayoutTests/storage/indexeddb/delete-in-upgradeneeded-close-in-versionchange-expected.txt

 Test that a deleteDatabase called while handling an upgradeneeded event is queued and fires its events at the right time. The close() call to unblock the delete occurs in the connection's 'versionchange' event handler.
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
-indexedDB = self.indexedDB || self.webkitIndexedDB || self.mozIndexedDB || self.msIndexedDB || self.OIndexedDB;
-
 dbname = "delete-in-upgradeneeded-close-in-versionchange.html"
 indexedDB.deleteDatabase(dbname)
 
 initiallyDeleted():
 request = indexedDB.open(dbname, 1)
 
 upgradeNeededCallback():
 PASS sawUpgradeNeeded is false
 sawUpgradeNeeded = true
 PASS event.oldVersion is 0
 PASS event.newVersion is 1
 db = event.target.result
 deleteRequest = indexedDB.deleteDatabase(dbname)
 request2.onsuccess = deleteSuccessCallback
 
 versionChangeCallback():
 PASS event.oldVersion is 1
 PASS event.newVersion is null
 sawVersionChange = true
 Closing the connection before the IDBOpenDBRequest's success fires will cause the open to fail.
 db.close()
 
 deleteSuccessCallback():
 PASS sawVersionChange is true
 PASS sawUpgradeNeeded is true
 PASS successfullyParsed is true
 
 TEST COMPLETE