Fix dcheck on win aura shutdown, use CloseNow to close secondary widgets

ui/views/widget/native_widget_aura.cc

Index: ui/views/widget/native_widget_aura.cc
diff --git a/ui/views/widget/native_widget_aura.cc b/ui/views/widget/native_widget_aura.cc
index 04af1cea6c204429f878c2efbe6f7f0103987e3b..fd9db9387b805bcbe730626c857d045e15d6f004 100644
--- a/ui/views/widget/native_widget_aura.cc
+++ b/ui/views/widget/native_widget_aura.cc
@@ -903,7 +903,11 @@ BOOL CALLBACK WindowCallbackProc(HWND hwnd, LPARAM lParam) {
   if (root_window) {
     Widget* widget = Widget::GetWidgetForNativeView(root_window);
     if (widget && widget->is_secondary_widget())
-      widget->Close();
+      // To avoid the delay in shutdown caused by using Close which may wait
+      // for animations, use CloseNow. Because this is only used on secondary
+      // widgets it seems relatively safe to skip the extra processing of
+      // Close.
+      widget->CloseNow();
   }
   return TRUE;
 }