Fix bug in quicklaunch

mash/quick_launch/quick_launch_application.cc

Index: mash/quick_launch/quick_launch_application.cc
diff --git a/mash/quick_launch/quick_launch_application.cc b/mash/quick_launch/quick_launch_application.cc
index c5ba2de08fa1adffa205f813fb14e927ddecb3aa..7b10b3618074d217e969fca0b6fc0ac9abfb3d3b 100644
--- a/mash/quick_launch/quick_launch_application.cc
+++ b/mash/quick_launch/quick_launch_application.cc
@@ -159,7 +159,7 @@ void QuickLaunchApplication::RemoveWindow(views::Widget* window) {
   auto it = std::find(windows_.begin(), windows_.end(), window);
   DCHECK(it != windows_.end());
   windows_.erase(it);
-  if (windows_.empty())
+  if (windows_.empty() && base::MessageLoop::current()->is_running())
     base::MessageLoop::current()->QuitWhenIdle();
 }