Service isolate rework take 2

tests/standalone/vmservice/test_helper.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 vmservice_test_helper;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 import 'package:expect/expect.dart';
@@ skipping 137 matching lines @@
         if (line == '') {
           // Received blank line.
           blank = true;
         }
         if (portNumber != null && blank == true && first == true) {
           completer.complete(portNumber);
           // Stop repeat completions.
           first = false;
           print('** Signaled to run test queries on $portNumber');
         }
-        print(line);
       });
       process.stderr.transform(UTF8.decoder)
                     .transform(new LineSplitter()).listen((line) {
         print(line);
       });
       process.exitCode.then((code) {
         Expect.equals(0, code, 'Launched dart executable exited with error.');
       });
       return completer.future;
     });
@@ skipping 97 matching lines @@
       });
     });
     return Future.wait(requests).then((a) {
       a.forEach((FieldRequestHelper field) {
         fields[field.field['name']] = field.field;
       });
       return this;
     });
   }
 }