VM restart + shutdown fixes

runtime/vm/service_isolate.cc

 // Copyright (c) 2015, 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.
 
 #include "vm/service_isolate.h"
 
 #include "vm/compiler.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
 #include "vm/isolate.h"
@@ skipping 752 matching lines @@
 
 
 void ServiceIsolate::KillServiceIsolate() {
   if (!FLAG_shutdown) {
     return;
   }
   {
     MonitorLocker ml(monitor_);
     shutting_down_ = true;
   }
-  Isolate::KillIfExists(isolate_);
+  Isolate::KillIfExists(isolate_, Isolate::kInternalKillMsg);
   {
     MonitorLocker ml(monitor_);
     while (shutting_down_) {
       ml.Wait();
     }
   }
 }
 
 
 void ServiceIsolate::Shutdown() {
@@ skipping 61 matching lines @@
     return result;
   }
   Dart_Handle source = GetSource(url_string);
   if (Dart_IsError(source)) {
     return source;
   }
   return Dart_LoadSource(library, url, source, 0, 0);
 }
 
 }  // namespace dart