const PRUnichar* aURLSpec,
nsIURI* aURI,
nsWebShell::OnLinkClick(nsIContent* aContent,                         nsLinkVerb aVerb,                        const PRUnichar* aURLSpec,                        const PRUnichar* aTargetSpec,                        nsIPostData* aPostData){  OnLinkClickEvent* ev;  nsresult rv = NS_OK;  ev = new OnLinkClickEvent(this, aContent, aVerb, aURLSpec,                             aTargetSpec, aPostData);  if (nsnull == ev) {    rv = NS_ERROR_OUT_OF_MEMORY;  }  return rv;}