Change a bool type to an enum type in constructor argument of SpaceSplitString.

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index fe98db1f68e5d3f77b24ce9dd8cd13a2df3eff39..cdb35ba87346307d9aeea36dd98c6b518d53169e 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -1191,9 +1191,8 @@ bool Element::shouldInvalidateDistributionWhenAttributeChanged(ElementShadow* el
     if (name == HTMLNames::classAttr) {
         const AtomicString& newClassString = newValue;
         if (classStringHasClassName(newClassString)) {
-            const bool shouldFoldCase = document().inQuirksMode();
             const SpaceSplitString& oldClasses = elementData()->classNames();
-            const SpaceSplitString newClasses(newClassString, shouldFoldCase);
+            const SpaceSplitString newClasses(newClassString, document().inQuirksMode() ? ShouldFoldCase : ShouldNotFoldCase);
             if (featureSet.checkSelectorsForClassChange(oldClasses, newClasses))
                 return true;
         } else {