dart2js: check for the full getter/setter prefixes (fix #23828)

tests/compiler/dart2js_extra/23828_test.dart

Index: tests/compiler/dart2js_extra/23828_test.dart
diff --git a/tests/language/final_super_field_set_test.dart b/tests/compiler/dart2js_extra/23828_test.dart
similarity index 50%
copy from tests/language/final_super_field_set_test.dart
copy to tests/compiler/dart2js_extra/23828_test.dart
index 9c3289bb1f94059cdc49e5330bfad14bb4f58d3f..b6312a3901cf9b3233e03d3bffb6535a3d36dae2 100644
--- a/tests/language/final_super_field_set_test.dart
+++ b/tests/compiler/dart2js_extra/23828_test.dart
@@ -2,19 +2,16 @@
 // 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.
 
+// Regression test for http://dartbug.com/23828/
+// Used to fail when methods contain a name starting with `get`
 import 'package:expect/expect.dart';
 
-class SuperClass {
-  final field = 0;
-  noSuchMethod(_) => 42;
-}
+confuse(x) { return x; return x; }
 
-class Class extends SuperClass {
-  m() {
-    super.field = 87; /// 01: static type warning
-  }
+class MA {
+  noSuchMethod(i) => Expect.equals(i.positionalArguments.length, 1);
 }
 
 main() {
-  new Class().m(); /// 01: continued
-}
+  confuse(new MA()).getFoo('a');
+}