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

Source/core/editing/markup.cpp

Index: Source/core/editing/markup.cpp
diff --git a/Source/core/editing/markup.cpp b/Source/core/editing/markup.cpp
index 505ecad6725a34c1cf7738181d4dbce1b3888e99..0a2912be466b5d6d5d2b7f6e5463dc89a02b03a4 100644
--- a/Source/core/editing/markup.cpp
+++ b/Source/core/editing/markup.cpp
@@ -162,12 +162,12 @@ bool propertyMissingOrEqualToNone(StylePropertySet* style, CSSPropertyID propert
 {
     if (!style)
         return false;
-    RefPtrWillBeRawPtr<CSSValue> value = style->getPropertyCSSValue(propertyID);
+    NullableCSSValue value = style->getPropertyCSSValue(propertyID);
     if (!value)
         return true;
     if (!value->isPrimitiveValue())
         return false;
-    return toCSSPrimitiveValue(value.get())->getValueID() == CSSValueNone;
+    return toCSSPrimitiveValue(value)->getValueID() == CSSValueNone;
 }
 
 static bool isPresentationalHTMLElement(const Node* node)