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

Source/core/css/CSSMatrix.cpp

Index: Source/core/css/CSSMatrix.cpp
diff --git a/Source/core/css/CSSMatrix.cpp b/Source/core/css/CSSMatrix.cpp
index 78a9936b29e150acdd3fb90ceb39d0845b518b18..daef01a61d477e5d500b6e78fd5a5c702108f772 100644
--- a/Source/core/css/CSSMatrix.cpp
+++ b/Source/core/css/CSSMatrix.cpp
@@ -69,9 +69,9 @@ void CSSMatrix::setMatrixValue(const String& string, ExceptionState& exceptionSt
     if (string.isEmpty())
         return;
 
-    if (RefPtrWillBeRawPtr<CSSValue> value = CSSParser::parseSingleValue(CSSPropertyTransform, string)) {
+    if (NullableCSSValue value = CSSParser::parseSingleValue(CSSPropertyTransform, string)) {
         // Check for a "none" transform. In these cases we can use the default identity matrix.
-        if (value->isPrimitiveValue() && (toCSSPrimitiveValue(value.get()))->getValueID() == CSSValueNone)
+        if (value->isPrimitiveValue() && (toCSSPrimitiveValue(value)->getValueID() == CSSValueNone))
             return;
 
         DEFINE_STATIC_REF(ComputedStyle, initialStyle, createInitialStyle());