Fix Mac password bubble crash due to the "nope" menu hanging around.

chrome/browser/ui/cocoa/passwords/manage_passwords_bubble_pending_view_controller.mm

Index: chrome/browser/ui/cocoa/passwords/manage_passwords_bubble_pending_view_controller.mm
diff --git a/chrome/browser/ui/cocoa/passwords/manage_passwords_bubble_pending_view_controller.mm b/chrome/browser/ui/cocoa/passwords/manage_passwords_bubble_pending_view_controller.mm
index bfa5a69928a4340f131fdbf3b8a96d7c540a599d..2a978bbb1129a0e09828104b41fe6ca9d718769a 100644
--- a/chrome/browser/ui/cocoa/passwords/manage_passwords_bubble_pending_view_controller.mm
+++ b/chrome/browser/ui/cocoa/passwords/manage_passwords_bubble_pending_view_controller.mm
@@ -35,6 +35,13 @@ using namespace password_manager::mac::ui;
   return self;
 }
 
+- (void)bubbleWillDisappear {
+  // The "nope" drop-down won't be dismissed until the user chooses an option,
+  // but if the bubble is dismissed (by cross-platform code) before the user
+  // makes a choice, then the choice won't actually take any effect.
+  [[nopeButton_ menu] cancelTrackingWithoutAnimation];
+}
+
 - (void)onSaveClicked:(id)sender {
   model_->OnSaveClicked();
   [delegate_ viewShouldDismiss];