Always initialize the EventHandler in the standalone.

runtime/bin/eventhandler.h

Index: runtime/bin/eventhandler.h
diff --git a/runtime/bin/eventhandler.h b/runtime/bin/eventhandler.h
index 8a2604303c8326e33cd6a4b83ca13db65f1a5e3a..a9b0bcd089693172d41346fe5ae0649511650880 100644
--- a/runtime/bin/eventhandler.h
+++ b/runtime/bin/eventhandler.h
@@ -108,16 +108,15 @@ class EventHandler {
     delegate_.SendData(id, dart_port, data);
   }
 
-  void Shutdown() {
-    delegate_.Shutdown();
-  }
-
-  static EventHandler* Start() {
-    EventHandler* handler = new EventHandler();
-    handler->delegate_.Start(handler);
-    return handler;
-  }
-
+  /**
+   * Start the event-handler.
+   */
+  static void Start();
+
+  /**
+   * Stop the event-handler. It's expected that there will be no further calls
+   * to SendData after a call to Stop.
+   */
   static void Stop();
 
  private: