Do not create display_change_listener for parent=NULL.

ui/views/controls/menu/menu_runner.cc

Index: ui/views/controls/menu/menu_runner.cc
diff --git a/ui/views/controls/menu/menu_runner.cc b/ui/views/controls/menu/menu_runner.cc
index 9308cc92fa17948f16d0b14ee9343be64eb91497..d29e24cefd7ac4883130c6a6b8023d6732407d2c 100644
--- a/ui/views/controls/menu/menu_runner.cc
+++ b/ui/views/controls/menu/menu_runner.cc
@@ -317,7 +317,7 @@ MenuRunner::RunResult MenuRunner::RunMenuAt(Widget* parent,
   // The parent of the nested menu will have created a DisplayChangeListener, so
   // we avoid creating a DisplayChangeListener if nested. Drop menus are
   // transient, so we don't cancel in that case.
-  if ((types & (IS_NESTED | FOR_DROP)) == 0) {
+  if ((types & (IS_NESTED | FOR_DROP)) == 0 && parent) {
     display_change_listener_.reset(
         internal::DisplayChangeListener::Create(parent, this));
   }