Remove race(s) in vmservice tests.

runtime/bin/vmservice_impl.h

 // 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.
 
 #ifndef BIN_VMSERVICE_IMPL_H_
 #define BIN_VMSERVICE_IMPL_H_
 
 #include "bin/vmservice.h"
 #include "platform/thread.h"
 
 
 namespace dart {
 namespace bin {
 
 class VmService {
  public:
   // Returns false if service could not be started.
   static bool Start(intptr_t server_port);
   // Error message if startup failed.
   static const char* GetErrorMessage();
 
   static Dart_Port port();
 
   static bool IsRunning();
 
-  static bool SendIsolateStartupMessage(Dart_Port port);
+  static bool SendIsolateStartupMessage(Dart_Port port, Dart_Handle name);
   static bool SendIsolateShutdownMessage(Dart_Port port);
 
   static void VmServiceShutdownCallback(void* callback_data);
 
  private:
   static bool _Start(intptr_t server_port);
   static void _Stop();
   static Dart_Handle GetSource(const char* name);
   static Dart_Handle LoadScript(const char* name);
   static Dart_Handle LoadSources(Dart_Handle library, const char** names);
@@ skipping 14 matching lines @@
 
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(VmService);
 };
 
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // BIN_VMSERVICE_IMPL_H_