Introduced support for external services registration in the ServiceProtocol

runtime/observatory/tests/service/developer_server_control_test.dart

 // Copyright (c) 2014, 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.
 // VMOptions=--error_on_bad_type --error_on_bad_override
 
 import 'dart:async';
 import 'dart:developer';
-import 'package:observatory/service_io.dart';
+import 'package:observatory/service_io.dart' as S;
 import 'package:unittest/unittest.dart';
 import 'test_helper.dart';
 
 int majorVersion;
 int minorVersion;
 Uri serverUri;
 
 Future<Null> testeeBefore() async {
   print('testee before');
   // First grab the URL where the observatory is listening on and the
@@ skipping 43 matching lines @@
     majorVersion = info.majorVersion;
     minorVersion = info.minorVersion;
     serverUri = info.serverUri;
     expect(info.majorVersion, equals(majorVersion));
     expect(info.minorVersion, equals(minorVersion));
     expect(info.serverUri, equals(serverUri));
   }
 }
 
 var tests = [
-  (Isolate isolate) async {
+  (S.Isolate isolate) async {
     await isolate.reload();
     // Just getting here means that the testee enabled the service protocol
     // web server.
     expect(true, true);
   }
 ];
 
 main(args) => runIsolateTests(args, tests,
     testeeBefore: testeeBefore,
     // the testee is responsible for starting the
     // web server.
     testeeControlsServer: true);