Fix pause-on-start and pause-on-exit with async loading.

runtime/vm/service.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 "vm/service.h"
 
 #include "include/dart_api.h"
 #include "platform/globals.h"
 
 #include "vm/compiler.h"
@@ skipping 311 matching lines @@
   if (create_callback == NULL) {
     return NULL;
   }
   Isolate::SetCurrent(NULL);
   char* error = NULL;
   Isolate* isolate = reinterpret_cast<Isolate*>(
       create_callback(callback_data, &error));
   if (isolate == NULL) {
     return NULL;
   }
-  // We don't want to pause the service isolate.
-  isolate->message_handler()->set_pause_on_start(false);
-  isolate->message_handler()->set_pause_on_exit(false);
   Isolate::SetCurrent(isolate);
   {
     // Install the dart:vmservice library.
     StackZone zone(isolate);
     HANDLESCOPE(isolate);
     Library& library =
         Library::Handle(isolate, isolate->object_store()->root_library());
     // Isolate is empty.
     ASSERT(library.IsNull());
     // Grab embedder tag handler.
@@ skipping 1722 matching lines @@
   while (current != NULL) {
     if (strcmp(name, current->name()) == 0) {
       return current;
     }
     current = current->next();
   }
   return NULL;
 }
 
 }  // namespace dart