bindings: Add validation for enum Sequence or Array

LayoutTests/storage/indexeddb/transaction-basics-expected.txt

 Test IndexedDB transaction basics.
 
 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 = "transaction-basics.html"
 indexedDB.deleteDatabase(dbname)
 indexedDB.open(dbname)
@@ skipping 212 matching lines @@
 db.objectStoreNames is [object DOMStringList]
 ... which contains: ["storeName"]
 transaction = db.transaction(db.objectStoreNames)
 PASS no exception thrown
 PASS transaction.objectStore("storeName") is non-null.
 PASS all stores present in transaction
 
 Verify that specifying an invalid mode raises an exception
 Expecting TypeError exception from db.transaction(['storeName'], 'lsakjdf')
 PASS Exception was thrown.
-PASS db.transaction(['storeName'], 'lsakjdf') threw TypeError: Failed to execute 'transaction' on 'IDBDatabase': parameter 2 ('lsakjdf') is not a valid enum value.
+PASS db.transaction(['storeName'], 'lsakjdf') threw TypeError: Failed to execute 'transaction' on 'IDBDatabase': The provided value 'lsakjdf' is not a valid enum value.
 
 Test that null and undefined are treated as strings
 Expecting exception from db.transaction(null)
 PASS Exception was thrown.
 PASS code is DOMException.NOT_FOUND_ERR
 PASS ename is 'NotFoundError'
 Exception message: Failed to execute 'transaction' on 'IDBDatabase': One of the specified object stores was not found.
 Expecting exception from db.transaction(undefined)
 PASS Exception was thrown.
 PASS code is DOMException.NOT_FOUND_ERR
 PASS ename is 'NotFoundError'
 Exception message: Failed to execute 'transaction' on 'IDBDatabase': One of the specified object stores was not found.
 request = newConnection()
 indexedDB.open(dbname, 8)
 db.createObjectStore('null')
 db.createObjectStore('undefined')
 PASS transaction = db.transaction(null) did not throw exception.
 PASS transaction.objectStore('null') is non-null.
 PASS transaction = db.transaction(undefined) did not throw exception.
 PASS transaction.objectStore('undefined') is non-null.
 PASS successfullyParsed is true
 
 TEST COMPLETE