return NS_OK;
rv = catman->DeleteCategoryEntry("Gecko-Content-Viewers", "application/http-index-format; x-view-type=view-source", PR_TRUE);  return rv;
UnregisterProc(nsIComponentManager *aCompMgr,               nsIFile *aPath,               const char *registryLocation,               const nsModuleComponentInfo *info){    nsresult rv;    nsCOMPtr<nsICategoryManager> catman = do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv);    if (NS_FAILED(rv)) return rv;    rv = catman->DeleteCategoryEntry("Gecko-Content-Viewers",                                      "application/http-index-format", PR_TRUE);    return NS_OK;}