Using 'interface' and 'abstract' for methods should produce error

compiler/javatests/com/google/dart/compiler/end2end/inc/some.dart

Index: compiler/javatests/com/google/dart/compiler/end2end/inc/some.dart
diff --git a/compiler/javatests/com/google/dart/compiler/end2end/inc/some.dart b/compiler/javatests/com/google/dart/compiler/end2end/inc/some.dart
index 8624331e4bd45b2d895326ac4dc350f89015f012..fc5b2cbd543d73b5e1a4dc52fd34d8f0f9d99b44 100644
--- a/compiler/javatests/com/google/dart/compiler/end2end/inc/some.dart
+++ b/compiler/javatests/com/google/dart/compiler/end2end/inc/some.dart
@@ -2,12 +2,12 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-interface SomeClass default SomeClassImpl {
-  SomeClass(arg);
+abstract class SomeClass {
+  factory SomeClass(arg) = SomeClassImpl;
   get message;
 }
 
-interface SomeInterface2 {
+abstract class SomeInterface2 {
 }
 
 // myother7.dart/Baz depends on SomeClass2 which depends on SomeInterface2