Indexed DB: Remove vendor prefix removal from tests

LayoutTests/storage/indexeddb/mozilla/put-get-values-expected.txt

 Test IndexedDB's putting and getting values in an object store
 
 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 = "put-get-values.html"
 indexedDB.deleteDatabase(dbname)
 indexedDB.open(dbname)
 testString = { key: 0, value: 'testString' };
 testInt = { key: 1, value: 1002 };
 objectStore = db.createObjectStore('Objects', { autoIncrement: false });
 request = objectStore.add(testString.value, testString.key);
 PASS event.target.result is testString.key
 request = objectStore.get(testString.key);
 PASS event.target.result is testString.value
 request = objectStore.add(testInt.value, testInt.key);
 PASS event.target.result is testInt.key
 request = objectStore.get(testInt.key);
 PASS event.target.result is testInt.value
 objectStoreAutoIncrement = db.createObjectStore('AutoIncremented Objects', { autoIncrement: true });
 request = objectStoreAutoIncrement.add(testString.value);
 testString.key = event.target.result;
 request = objectStoreAutoIncrement.get(testString.key);
 PASS event.target.result is testString.value
 request = objectStoreAutoIncrement.add(testInt.value);
 testInt.key = event.target.result;
 request = objectStoreAutoIncrement.get(testInt.key);
 PASS event.target.result is testInt.value
 PASS successfullyParsed is true
 
 TEST COMPLETE