Expand overloaded methods and optional parameters in the html library.

tests/html/indexeddb_2_test.dart

Index: tests/html/indexeddb_2_test.dart
diff --git a/tests/html/indexeddb_2_test.dart b/tests/html/indexeddb_2_test.dart
index 9a9feac3e08adfe28309495c3870b48672454f4f..927b449dd50f7619805017a9b6af2e796d00212f 100644
--- a/tests/html/indexeddb_2_test.dart
+++ b/tests/html/indexeddb_2_test.dart
@@ -28,7 +28,7 @@ testReadWrite(key, value, check,
         onUpgradeNeeded: createObjectStore);
     }).then((result) {
       db = result;
-      var transaction = db.transaction([storeName], 'readwrite');
+      var transaction = db.transactionList([storeName], 'readwrite');
       transaction.objectStore(storeName).put(value, key);
 
       return transaction.completed;