Send fake event when event_type is set to exit menu

ui/aura/desktop.h

Index: ui/aura/desktop.h
diff --git a/ui/aura/desktop.h b/ui/aura/desktop.h
index 10e7f64efa02aa96c6d863ddedcb64aeceeaf7a5..43f2e5d1d22461e2da8dde5e16049bf451820c16 100644
--- a/ui/aura/desktop.h
+++ b/ui/aura/desktop.h
@@ -125,6 +125,9 @@ class AURA_EXPORT Desktop : public ui::CompositorDelegate,
   // Are any mouse buttons currently down?
   bool IsMouseButtonDown() const;
 
+  // Posts |native_event| to the platform's event queue.
+  void PostNativeEvent(const base::NativeEvent& native_event);
+
   // Capture -------------------------------------------------------------------
 
   // Sets capture to the specified window.