WIP: Reduce sizeof(CSSValue) by 8 byte

Source/core/css/CSSValue.cpp

Index: Source/core/css/CSSValue.cpp
diff --git a/Source/core/css/CSSValue.cpp b/Source/core/css/CSSValue.cpp
index 4f9805848f9867caff5fa16af3943f92b8d4b4b2..9fa0ba6f91a9b11f02038e38e4f05ce5e8d9d902 100644
--- a/Source/core/css/CSSValue.cpp
+++ b/Source/core/css/CSSValue.cpp
@@ -64,7 +64,7 @@ static_assert(sizeof(CSSValue) <= sizeof(SameSizeAsCSSValue), "CSSValue should s
 
 bool CSSValue::isImplicitInitialValue() const
 {
-    return m_classType == InitialClass && toCSSInitialValue(this)->isImplicit();
+    return classType() == InitialClass && toCSSInitialValue(this)->isImplicit();
 }
 
 bool CSSValue::hasFailedOrCanceledSubresources() const
@@ -91,7 +91,7 @@ inline static bool compareCSSValues(const CSSValue& first, const CSSValue& secon
 
 bool CSSValue::equals(const CSSValue& other) const
 {
-    if (m_classType == other.m_classType) {
+    if (classType() == other.classType()) {
         switch (classType()) {
         case BorderImageSliceClass:
             return compareCSSValues<CSSBorderImageSliceValue>(*this, other);