if (gInstances++ == 0) { const char kQuirk_href[] = "resource:/res/quirk.css"; NS_NewURI (&gQuirkURI, kQuirk_href); NS_ASSERTION (gQuirkURI != 0, "Cannot allocate nsStyleSetImpl::gQuirkURI"); }
StyleSetImpl::StyleSetImpl()  : mOverrideSheets(nsnull),    mDocSheets(nsnull),    mBackstopSheets(nsnull),    mBackstopRuleProcessors(nsnull),    mDocRuleProcessors(nsnull),    mOverrideRuleProcessors(nsnull),    mRecycler(nsnull),    mFrameConstructor(nsnull),    mQuirkStyleSheet(nsnull),    mStyleRuleSupplier(nsnull)#ifdef SHARE_STYLECONTEXTS#ifdef USE_FAST_CACHE    ,mStyleContextCache()#else    ,mStyleContextCache(0)#endif // USE_FAST_CACHE#endif#ifdef MOZ_PERF_METRICS    ,mTimerEnabled(PR_FALSE)#endif{  NS_INIT_REFCNT();}