Enables clean VM shutdown.

runtime/vm/service_isolate.cc

Index: runtime/vm/service_isolate.cc
diff --git a/runtime/vm/service_isolate.cc b/runtime/vm/service_isolate.cc
index 312667869ff20c14891cfb4979a79e37e5b6b83e..4680820273b390b0d4f63c6f6f8d9205de413e12 100644
--- a/runtime/vm/service_isolate.cc
+++ b/runtime/vm/service_isolate.cc
@@ -652,8 +652,7 @@ class RunServiceTask : public ThreadPool::Task {
 
     ServiceIsolate::FinishedInitializing();
 
-    isolate->message_handler()->Run(Dart::thread_pool(),
-                                    NULL,
+    isolate->message_handler()->Run(NULL,
                                     ShutdownIsolate,
                                     reinterpret_cast<uword>(isolate));
   }
@@ -668,6 +667,9 @@ class RunServiceTask : public ThreadPool::Task {
       StartIsolateScope start_scope(isolate);
       StackZone zone(isolate);
       HandleScope handle_scope(isolate);
+
+      ServiceIsolate::KillAllIsolates();
+
       Error& error = Error::Handle();
       error = isolate->object_store()->sticky_error();
       if (!error.IsNull()) {
@@ -744,7 +746,7 @@ void ServiceIsolate::Run() {
   // Grab the isolate create callback here to avoid race conditions with tests
   // that change this after Dart_Initialize returns.
   create_callback_ = Isolate::CreateCallback();
-  Dart::thread_pool()->Run(new RunServiceTask());
+  ThreadPool::Run(new RunServiceTask());
 }
 
 
@@ -812,4 +814,9 @@ Dart_Handle ServiceIsolate::LibraryTagHandler(Dart_LibraryTag tag,
   return Dart_LoadSource(library, url, source, 0, 0);
 }
 
+
+void ServiceIsolate::KillAllIsolates() {
+  Isolate::KillAllIsolates(isolate_);
+}
+
 }  // namespace dart