Remove addLast from List.

sdk/lib/web_sql/dart2js/web_sql_dart2js.dart

Index: sdk/lib/web_sql/dart2js/web_sql_dart2js.dart
diff --git a/sdk/lib/web_sql/dart2js/web_sql_dart2js.dart b/sdk/lib/web_sql/dart2js/web_sql_dart2js.dart
index c0df4c96d2c134741bfc5d543a6a8a3641a0d467..4af5263935e7b328e51ee762ee98478df4e2cfb4 100644
--- a/sdk/lib/web_sql/dart2js/web_sql_dart2js.dart
+++ b/sdk/lib/web_sql/dart2js/web_sql_dart2js.dart
@@ -328,10 +328,6 @@ class SqlResultSetRowList implements JavaScriptIndexingBehavior, List<Map> nativ
     throw new UnsupportedError("Cannot add to immutable List.");
   }
 
-  void addLast(Map value) {
-    throw new UnsupportedError("Cannot add to immutable List.");
-  }
-
   void addAll(Iterable<Map> iterable) {
     throw new UnsupportedError("Cannot add to immutable List.");
   }