Disables showing tooltips while a system menu is showing on windows

ui/views/win/hwnd_message_handler.cc

Index: ui/views/win/hwnd_message_handler.cc
diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc
index 396184e3b54e73032003d7a379df91af3298b42c..fd50cadfd8265b8caba7415517ca18e2a8bd890e 100644
--- a/ui/views/win/hwnd_message_handler.cc
+++ b/ui/views/win/hwnd_message_handler.cc
@@ -388,6 +388,7 @@ HWNDMessageHandler::HWNDMessageHandler(HWNDMessageHandlerDelegate* delegate)
       layered_alpha_(255),
       waiting_for_redraw_layered_window_contents_(false),
       is_first_nccalc_(true),
+      menu_depth_(0),
       autohide_factory_(this),
       id_generator_(0) {
 }
@@ -1367,6 +1368,11 @@ LRESULT HWNDMessageHandler::OnDwmCompositionChanged(UINT msg,
   return 0;
 }
 
+void HWNDMessageHandler::OnEnterMenuLoop(BOOL from_track_popup_menu) {
+  if (menu_depth_++ == 0)
+    delegate_->HandleMenuLoop(true);
+}
+
 void HWNDMessageHandler::OnEnterSizeMove() {
   delegate_->HandleBeginWMSizeMove();
   SetMsgHandled(FALSE);
@@ -1377,6 +1383,12 @@ LRESULT HWNDMessageHandler::OnEraseBkgnd(HDC dc) {
   return 1;
 }
 
+void HWNDMessageHandler::OnExitMenuLoop(BOOL is_shortcut_menu) {
+  if (--menu_depth_ == 0)
+    delegate_->HandleMenuLoop(false);
+  DCHECK_GE(0, menu_depth_);
+}
+
 void HWNDMessageHandler::OnExitSizeMove() {
   delegate_->HandleEndWMSizeMove();
   SetMsgHandled(FALSE);