Disables showing tooltips while a system menu is showing on windows

ui/views/widget/desktop_aura/desktop_root_window_host_win.h

Index: ui/views/widget/desktop_aura/desktop_root_window_host_win.h
diff --git a/ui/views/widget/desktop_aura/desktop_root_window_host_win.h b/ui/views/widget/desktop_aura/desktop_root_window_host_win.h
index 59f64f8171d92ccf0e19a158b042ad64475627dd..7352eb848b5f9c46d1005cfa22f135c318fdc2b3 100644
--- a/ui/views/widget/desktop_aura/desktop_root_window_host_win.h
+++ b/ui/views/widget/desktop_aura/desktop_root_window_host_win.h
@@ -15,6 +15,7 @@ namespace aura {
 namespace client {
 class DragDropClient;
 class FocusClient;
+class ScopedTooltipDisabler;
 }
 }
 
@@ -201,6 +202,7 @@ class VIEWS_EXPORT DesktopRootWindowHostWin
   virtual void HandleTooltipMouseMove(UINT message,
                                       WPARAM w_param,
                                       LPARAM l_param) OVERRIDE;
+  virtual void HandleMenuLoop(bool in_menu_loop) OVERRIDE;
   virtual bool PreHandleMSG(UINT message,
                             WPARAM w_param,
                             LPARAM l_param,
@@ -269,6 +271,8 @@ class VIEWS_EXPORT DesktopRootWindowHostWin
   // State of the cursor.
   bool is_cursor_visible_;
 
+  scoped_ptr<aura::client::ScopedTooltipDisabler> tooltip_disabler_;
+
   DISALLOW_COPY_AND_ASSIGN(DesktopRootWindowHostWin);
 };