PRInt32      aHint)
nsChangeHint aHint)
PresShell::AttributeChanged(nsIDocument *aDocument,                            nsIContent*  aContent,                            PRInt32      aNameSpaceID,                            nsIAtom*     aAttribute,                            PRInt32      aModType,                             PRInt32      aHint){  nsresult rv = NS_OK;  // XXXwaterson it might be more elegant to wait until after the  // initial reflow to begin observing the document. That would  // squelch any other inappropriate notifications as well.  if (mDidInitialReflow) {    WillCauseReflow();    rv = mStyleSet->AttributeChanged(mPresContext, aContent, aNameSpaceID, aAttribute, aModType, aHint);    VERIFY_STYLE_TREE;    DidCauseReflow();  }  return rv;}