Refactor VM service IDs

tests/standalone/vmservice/isolate_class_field_test.dart

 // Copyright (c) 2013, 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.
 
 library isolate_class_list_test;
 
 import 'dart:async';
 import 'test_helper.dart';
 import 'package:expect/expect.dart';
 
@@ skipping 122 matching lines @@
       _testFieldV(helper.fields['v']);
       _testFieldC(helper.fields['c']);
       _testFieldFinalFixedLengthList(helper.fields['final_fixed_length_list']);
       _testFieldFixedLengthArray(helper.fields['fixed_length_array']);
     });
   }
 }
 
 class ClassTableTest extends VmServiceRequestHelper {
   ClassTableTest(port, id) :
-      super('http://127.0.0.1:$port/isolates/$id/classes/');
+      super('http://127.0.0.1:$port/$id/classes/');
 
   int banana_class_id;
   int bad_banana_class_id;
 
   onRequestCompleted(Map reply) {
     ClassTableHelper helper = new ClassTableHelper(reply);
     Expect.isTrue(helper.classExists('Banana'));
     banana_class_id = helper.classId('Banana');
     Expect.isTrue(helper.classExists('BadBanana'));
     bad_banana_class_id = helper.classId('BadBanana');
@@ skipping 26 matching lines @@
             new BadBananaClassTest(port, test._isolateId,
                                    classTableTest.bad_banana_class_id);
         Future.wait([bananaClassTest.makeRequest(),
                      badBananaClassTest.makeRequest()]).then((_) {
           process.requestExit();
         });
       });
     });
   });
 }