CSSValue Immediates: Change CSSValue to an object instead of a pointer

Source/core/css/CSSInitialValue.h

Index: Source/core/css/CSSInitialValue.h
diff --git a/Source/core/css/CSSInitialValue.h b/Source/core/css/CSSInitialValue.h
index c493c3b055794aa4fb5db9078078611d3dc18777..f4dc86e6062bad161c530e4e3b43bdc3fcf8ca2d 100644
--- a/Source/core/css/CSSInitialValue.h
+++ b/Source/core/css/CSSInitialValue.h
@@ -26,7 +26,7 @@
 
 namespace blink {
 
-class CSSInitialValue : public CSSValue {
+class CSSInitialValue : public CSSValueObject {
 public:
     static PassRefPtrWillBeRawPtr<CSSInitialValue> createExplicit()
     {
@@ -43,11 +43,11 @@ public:
 
     bool equals(const CSSInitialValue&) const { return true; }
 
-    DEFINE_INLINE_TRACE_AFTER_DISPATCH() { CSSValue::traceAfterDispatch(visitor); }
+    DEFINE_INLINE_TRACE_AFTER_DISPATCH() { CSSValueObject::traceAfterDispatch(visitor); }
 
 private:
     explicit CSSInitialValue(bool implicit)
-        : CSSValue(InitialClass)
+        : CSSValueObject(InitialClass)
         , m_isImplicit(implicit)
     {
     }