Make String.charCodes a getter.

runtime/lib/string_base.dart

 // Copyright (c) 2012, 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.
 
 /**
  * [_StringBase] contains common methods used by concrete String
  * implementations, e.g., _OneByteString.
  */
 class _StringBase {
 
@@ skipping 284 matching lines @@
 
   List<String> splitChars() {
     int len = this.length;
     final result = new List<String>(len);
     for (int i = 0; i < len; i++) {
       result[i] = this[i];
     }
     return result;
   }
 
-  List<int> charCodes() {
+  List<int> get charCodes {
     int len = this.length;
     final result = new List<int>(len);
     for (int i = 0; i < len; i++) {
       result[i] = this.charCodeAt(i);
     }
     return result;
   }
 
   String toUpperCase() native "String_toUpperCase";
 
@@ skipping 163 matching lines @@
     for (int g in groups) {
       result.add(group(g));
     }
     return result;
   }
 
   final int _start;
   final String str;
   final String pattern;
 }