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 03a0fd4a673aff90f8c183e420bc98b2d63fbd6f..2d0b5bf018d514ff146ac2fdd2b6bffc5ae693d4 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;