--- a/gfx/layers/FrameMetrics.h
+++ b/gfx/layers/FrameMetrics.h
@@ -685,16 +685,22 @@ struct ScrollSnapInfo {
     return mScrollSnapTypeX == aOther.mScrollSnapTypeX &&
            mScrollSnapTypeY == aOther.mScrollSnapTypeY &&
            mScrollSnapIntervalX == aOther.mScrollSnapIntervalX &&
            mScrollSnapIntervalY == aOther.mScrollSnapIntervalY &&
            mScrollSnapDestination == aOther.mScrollSnapDestination &&
            mScrollSnapCoordinates == aOther.mScrollSnapCoordinates;
   }
 
+  bool HasScrollSnapping() const
+  {
+    return mScrollSnapTypeY != NS_STYLE_SCROLL_SNAP_TYPE_NONE ||
+           mScrollSnapTypeX != NS_STYLE_SCROLL_SNAP_TYPE_NONE;
+  }
+
   // The scroll frame's scroll-snap-type.
   // One of NS_STYLE_SCROLL_SNAP_{NONE, MANDATORY, PROXIMITY}.
   uint8_t mScrollSnapTypeX;
   uint8_t mScrollSnapTypeY;
 
   // The intervals derived from the scroll frame's scroll-snap-points.
   Maybe<nscoord> mScrollSnapIntervalX;
   Maybe<nscoord> mScrollSnapIntervalY;