Index: Source/core/html/track/vtt/VTTRegion.h |
diff --git a/Source/core/html/track/vtt/VTTRegion.h b/Source/core/html/track/vtt/VTTRegion.h |
index 114ff0be1d0cd45727a2103217eb71804f1ed3e7..78ddf93485afb903decce715ea5cf6e2597d056c 100644 |
--- a/Source/core/html/track/vtt/VTTRegion.h |
+++ b/Source/core/html/track/vtt/VTTRegion.h |
@@ -97,7 +97,7 @@ public: |
void displayLastVTTCueBox(); |
void willRemoveVTTCueBox(VTTCueBox*); |
- void trace(Visitor*); |
+ virtual void trace(Visitor*); |
private: |
VTTRegion(); |