Enables clean VM shutdown.

runtime/vm/dart_api_impl.cc

 // 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.
 
 #include "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "vm/class_finalizer.h"
@@ skipping 1629 matching lines @@
   CHECK_CALLBACK_STATE(isolate);
   Monitor monitor;
   MonitorLocker ml(&monitor);
   {
     SwitchIsolateScope switch_scope(NULL);
 
     RunLoopData data;
     data.monitor = &monitor;
     data.done = false;
     isolate->message_handler()->Run(
-        Dart::thread_pool(),
         NULL, RunLoopDone, reinterpret_cast<uword>(&data));
     while (!data.done) {
       ml.Wait();
     }
   }
   if (isolate->object_store()->sticky_error() != Object::null()) {
     Dart_Handle error = Api::NewHandle(isolate,
                                        isolate->object_store()->sticky_error());
     isolate->object_store()->clear_sticky_error();
     return error;
@@ skipping 4126 matching lines @@
   ASSERT(stream != NULL);
   TimelineEvent* event = stream->StartEvent();
   if (event != NULL) {
     event->AsyncEnd(label, async_id);
     event->Complete();
   }
   return Api::Success();
 }
 
 }  // namespace dart