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

Source/core/html/canvas/CanvasFontCache.cpp

Index: Source/core/html/canvas/CanvasFontCache.cpp
diff --git a/Source/core/html/canvas/CanvasFontCache.cpp b/Source/core/html/canvas/CanvasFontCache.cpp
index 9a4723a7101ee9287a7e83b1e828b36bd6e8a8ba..99d66a3d143059acd5c9d59b7ffdef13e2994bd7 100644
--- a/Source/core/html/canvas/CanvasFontCache.cpp
+++ b/Source/core/html/canvas/CanvasFontCache.cpp
@@ -97,7 +97,7 @@ MutableStylePropertySet* CanvasFontCache::parseFont(const String& fontString)
             return nullptr;
         // According to http://lists.w3.org/Archives/Public/public-html/2009Jul/0947.html,
         // the "inherit" and "initial" values must be ignored.
-        RefPtrWillBeRawPtr<CSSValue> fontValue = parsedStyle->getPropertyCSSValue(CSSPropertyFontSize);
+        NullableCSSValue fontValue = parsedStyle->getPropertyCSSValue(CSSPropertyFontSize);
         if (fontValue && (fontValue->isInitialValue() || fontValue->isInheritedValue()))
             return nullptr;
         m_fetchedFonts.add(fontString, parsedStyle);