NS_IMETHODIMP nsFieldSetFrame::ReplaceFrame(nsIAtom* aListName, nsIFrame* aOldFrame, nsIFrame* aNewFrame) { if (aOldFrame == mLegendFrame) { mLegendFrame = aNewFrame; return nsContainerFrame::ReplaceFrame(aListName, aOldFrame, aNewFrame); } return mContentFrame->ReplaceFrame(aListName, aOldFrame, aNewFrame); }