Indexed DB: Remove vendor prefix removal from tests

LayoutTests/storage/indexeddb/request-continue-abort-expected.txt

 Regression test for IDBRequest issue calling continue on a cursor then aborting.
 
 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 = "request-continue-abort.html"
 indexedDB.deleteDatabase(dbname)
 indexedDB.open(dbname)
 db.createObjectStore('store')
 
 testCursor:
 transaction = db.transaction('store', 'readwrite')
 store = transaction.objectStore('store')
 store.add('value1', 'key1')
 store.add('value2', 'key2')
 
 state = 0
 request = store.openCursor()
 
 'success' event fired at request.
 PASS ++state is 1
 request.result.continue()
 
 'error' event fired at request.
 PASS ++state is 2
 
 'abort' event fired at transaction.
 PASS ++state is 3
 PASS successfullyParsed is true
 
 TEST COMPLETE