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fix: potential crash on macOS app exit #29961

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merged 1 commit into from Jul 1, 2021
Merged

fix: potential crash on macOS app exit #29961

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7 changes: 5 additions & 2 deletions shell/browser/native_window_mac.mm
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Expand Up @@ -413,7 +413,7 @@ void ViewDidMoveToSuperview(NSView* self, SEL _cmd) {
// Use an NSEvent monitor to listen for the wheel event.
BOOL __block began = NO;
wheel_event_monitor_ = [NSEvent
addLocalMonitorForEventsMatchingMask:NSScrollWheelMask
addLocalMonitorForEventsMatchingMask:NSEventMaskScrollWheel
handler:^(NSEvent* event) {
if ([[event window] windowNumber] !=
[window_ windowNumber])
Expand Down Expand Up @@ -1657,7 +1657,10 @@ void ViewDidMoveToSuperview(NSView* self, SEL _cmd) {
DCHECK(!IsClosed());
ui::NativeTheme::GetInstanceForNativeUi()->RemoveObserver(this);
display::Screen::GetScreen()->RemoveObserver(this);
[NSEvent removeMonitor:wheel_event_monitor_];
if (wheel_event_monitor_) {
[NSEvent removeMonitor:wheel_event_monitor_];
wheel_event_monitor_ = nil;
}
}

void NativeWindowMac::OverrideNSWindowContentView() {
Expand Down