--- a/layout/generic/nsIFrame.cpp
+++ b/layout/generic/nsIFrame.cpp
@@ -7347,18 +7347,16 @@ void nsIFrame::InvalidateFrameWithRect(c
   }
 
   *rect = rect->Union(aRect);
 }
 
 /*static*/
 uint8_t nsIFrame::sLayerIsPrerenderedDataKey;
 
-bool nsIFrame::TryUpdateTransformOnly(Layer** aLayerResult) { return false; }
-
 bool nsIFrame::IsInvalid(nsRect& aRect) {
   if (!HasAnyStateBits(NS_FRAME_NEEDS_PAINT)) {
     return false;
   }
 
   if (HasAnyStateBits(NS_FRAME_HAS_INVALID_RECT)) {
     nsRect* rect = GetProperty(InvalidationRect());
     NS_ASSERTION(