Revert "Workaround Wayland popup menu bug."

This reverts commit 8db6dcf125.

ui/platform/linux/ui_utility_linux.cpp

@@ -8,7 +8,6 @@
 
 #include "base/platform/base_platform_info.h"
 #include "base/platform/linux/base_linux_library.h"
-#include "base/call_delayed.h"
 
 #ifndef DESKTOP_APP_DISABLE_X11_INTEGRATION
 #include "base/platform/linux/base_linux_xcb_utilities.h"
@@ -45,10 +44,6 @@ namespace Platform {
 namespace {
 
 static const auto kXCBFrameExtentsAtomName = u"_GTK_FRAME_EXTENTS"_q;
-constexpr auto kDelayDeactivateEventTimeout = crl::time(400);
-
-bool PendingDeactivateEvent/* = false*/;
-int ChildPopupsHiddenOnWayland/* = 0*/;
 
 #ifndef DESKTOP_APP_DISABLE_X11_INTEGRATION
 std::optional<bool> XCBWindowMapped(xcb_window_t window) {
@@ -611,33 +606,5 @@ void ShowWindowMenu(not_null<QWidget*> widget, const QPoint &point) {
 #endif // !DESKTOP_APP_DISABLE_X11_INTEGRATION
 }
 
-void RegisterChildPopupHiding() {
-	if (!::Platform::IsWayland()) {
-		return;
-	}
-	++ChildPopupsHiddenOnWayland;
-	base::call_delayed(kDelayDeactivateEventTimeout, [] {
-		if (!--ChildPopupsHiddenOnWayland) {
-			if (base::take(PendingDeactivateEvent)) {
-				// We didn't receive ApplicationActivate event in time.
-				QEvent appDeactivate(QEvent::ApplicationDeactivate);
-				QCoreApplication::sendEvent(qApp, &appDeactivate);
-			}
-		}
-	});
-}
-
-bool SkipApplicationDeactivateEvent() {
-	if (!ChildPopupsHiddenOnWayland) {
-		return false;
-	}
-	PendingDeactivateEvent = true;
-	return true;
-}
-
-void GotApplicationActivateEvent() {
-	PendingDeactivateEvent = false;
-}
-
 } // namespace Platform
 } // namespace Ui

ui/platform/mac/ui_utility_mac.mm

@@ -147,15 +147,5 @@ std::optional<bool> IsOverlapped(
 	return false;
 }
 
-void RegisterChildPopupHiding() {
-}
-
-bool SkipApplicationDeactivateEvent() {
-	return false;
-}
-
-void GotApplicationActivateEvent() {
-}
-
 } // namespace Platform
 } // namespace Ui

ui/platform/ui_platform_utility.h

@@ -45,12 +45,6 @@ void ShowWindowMenu(not_null<QWidget*> widget, const QPoint &point);
 
 void FixPopupMenuNativeEmojiPopup(not_null<PopupMenu*> menu);
 
-// Workaround for a Qt/Wayland bug that hides the parent popup when
-// the child popup gets hidden, by sending Deactivate / Activate events.
-void RegisterChildPopupHiding();
-[[nodiscard]] bool SkipApplicationDeactivateEvent();
-void GotApplicationActivateEvent();
-
 } // namespace Ui::Platform
 
 // Platform dependent implementations.

ui/platform/win/ui_utility_win.cpp

@@ -189,14 +189,4 @@ void FixPopupMenuNativeEmojiPopup(not_null<PopupMenu*> menu) {
 		menu->lifetime().make_state<Filter>(menu));
 }
 
-void RegisterChildPopupHiding() {
-}
-
-bool SkipApplicationDeactivateEvent() {
-	return false;
-}
-
-void GotApplicationActivateEvent() {
-}
-
 } // namespace Ui::Platform

ui/widgets/popup_menu.cpp

@@ -673,9 +673,6 @@ bool PopupMenu::eventFilter(QObject *o, QEvent *e) {
 }
 
 void PopupMenu::hideMenu(bool fast) {
-	if (fast && _parent) {
-		Platform::RegisterChildPopupHiding();
-	}
 	if (isHidden() || (_hiding && !fast)) {
 		return;
 	}