Allow this?.foo (again)

pkg/compiler/lib/src/warnings.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // 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.
 
 part of dart2js;
 
 const DONT_KNOW_HOW_TO_FIX = "Computer says no!";
 
 /**
  * The messages in this file should meet the following guide lines:
@@ skipping 580 matching lines @@
       examples: const ["""
 class C<T extends num> {}
 
 // 'String' is not a valid instantiation of T with bound num.'.
 main() => new C<String>();
 """]);
 
   static const MessageKind INVALID_USE_OF_SUPER = const MessageKind(
       "'super' not allowed here.");
 
-  static const MessageKind INVALID_USE_OF_THIS = const MessageKind(
-      "'this' not allowed here.");
-
   static const MessageKind INVALID_CASE_DEFAULT = const MessageKind(
       "'default' only allowed on last case of a switch.");
 
   static const MessageKind SWITCH_CASE_TYPES_NOT_EQUAL = const MessageKind(
       "'case' expressions do not all have type '#{type}'.");
 
   static const MessageKind SWITCH_CASE_TYPES_NOT_EQUAL_CASE = const MessageKind(
       "'case' expression of type '#{type}'.");
 
   static const MessageKind SWITCH_CASE_FORBIDDEN = const MessageKind(
@@ skipping 1961 matching lines @@
   static String convertToString(value) {
     if (value is ErrorToken) {
       // Shouldn't happen.
       return value.assertionMessage;
     } else if (value is Token) {
       value = value.value;
     }
     return '$value';
   }
 }