PassRefPtrWillBeRawPtr<MutableStylePropertySet> StylePropertySet::copyPropertiesInSet(const Vector<CSSPropertyID>& properties) const { WillBeHeapVector<CSSProperty, 256> list; list.reserveInitialCapacity(properties.size()); for (unsigned i = 0; i < properties.size(); ++i) { RefPtrWillBeRawPtr<CSSValue> value = getPropertyCSSValue(properties[i]); if (value) list.append(CSSProperty(properties[i], value.release(), false)); } return MutableStylePropertySet::create(list.data(), list.size()); }