Add class id constants fields to dart:_internal class 'ClassID'. Use the fields in the library (mor…

runtime/lib/double_patch.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.
 // Dart core library.
 
 // VM implementation of double.
 
 patch class double {
 
   static double _native_parse(_OneByteString string) native "Double_parse";
 
   static double _parse(var str) {
     str = str.trim();
 
     if (str.length == 0) return null;
 
     final ccid = ClassID.getID(str);
     _OneByteString oneByteString;
-    // TODO(floitsch): Allow _ExternalOneByteStrings. As of May 2013 they don't
-    // have any _classId.
-    if (ccid != _OneByteString._classId) {
+    // TODO(Srdjan): Allow _ExternalOneByteStrings.
+    if (ccid == ClassID.cidOneByteString) {
+      oneByteString = str;
+    } else {
       int length = str.length;
       var s = _OneByteString._allocate(length);
       for (int i = 0; i < length; i++) {
         int currentUnit = str.codeUnitAt(i);
         // All valid trimmed double strings must be ASCII.
         if (currentUnit < 128) {
           s._setAt(i, currentUnit);
         } else {
           return null;
         }
       }
       oneByteString = s;
-    } else {
-      oneByteString = str;
     }
 
     return _native_parse(oneByteString);
   }
 
   /* patch */ static double parse(String str,
                                   [double onError(String str)]) {
     var result = _parse(str);
     if (result == null) {
       if (onError == null) throw new FormatException(str);
       return onError(str);
     }
     return result;
   }
 }