1 files changed, 10 insertions, 0 deletions
diff --git a/dom/animation/Animation.h b/dom/animation/Animation.h
index c59d7d6ce..3263b30c4 100644
--- a/dom/animation/Animation.h
+++ b/dom/animation/Animation.h
@@ -326,6 +326,16 @@ public:
 
   void NotifyEffectTimingUpdated();
 
+  /**
+   * Used by subclasses to synchronously queue a cancel event in situations
+   * where the Animation may have been cancelled.
+   *
+   * We need to do this synchronously because after a CSS animation/transition
+   * is canceled, it will be released by its owning element and may not still
+   * exist when we would normally go to queue events on the next tick.
+   */
+  virtual void MaybeQueueCancelEvent(StickyTimeDuration aActiveTime) {};
+
 protected:
   void SilentlySetCurrentTime(const TimeDuration& aNewCurrentTime);
   void SilentlySetPlaybackRate(double aPlaybackRate);