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diff --git base/message_loop/message_pump_mac.mm base/message_loop/message_pump_mac.mm
index 25ee65396cfb7..3c9b433cb31bb 100644
--- base/message_loop/message_pump_mac.mm
+++ base/message_loop/message_pump_mac.mm
@@ -813,7 +813,8 @@ void MessagePumpUIApplication::Detach() {
#else
ScopedPumpMessagesInPrivateModes::ScopedPumpMessagesInPrivateModes() {
- DCHECK(g_app_pump);
+ if (!g_app_pump)
+ return;
DCHECK_EQ(kNSApplicationModalSafeModeMask, g_app_pump->GetModeMask());
// Pumping events in private runloop modes is known to interact badly with
// app modal windows like NSAlert.
@@ -823,7 +824,8 @@ ScopedPumpMessagesInPrivateModes::ScopedPumpMessagesInPrivateModes() {
}
ScopedPumpMessagesInPrivateModes::~ScopedPumpMessagesInPrivateModes() {
- DCHECK(g_app_pump);
+ if (!g_app_pump)
+ return;
g_app_pump->SetModeMask(kNSApplicationModalSafeModeMask);
}
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