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

Source/web/PluginPlaceholderImplTest.cpp

Index: Source/web/PluginPlaceholderImplTest.cpp
diff --git a/Source/web/PluginPlaceholderImplTest.cpp b/Source/web/PluginPlaceholderImplTest.cpp
index 8c8514e3bb37809fa1599bee5b1c18b95ca5a001..1b7028b804225803d6906b1bd184be8c2b8cf072 100644
--- a/Source/web/PluginPlaceholderImplTest.cpp
+++ b/Source/web/PluginPlaceholderImplTest.cpp
@@ -99,8 +99,8 @@ bool isHiddenWithInlineStyle(Element* element)
 {
     if (!element->inlineStyle())
         return false;
-    RefPtrWillBeRawPtr<CSSValue> value = element->inlineStyle()->getPropertyCSSValue(CSSPropertyDisplay);
-    return value && value->isPrimitiveValue() && toCSSPrimitiveValue(value.get())->getValueID() == CSSValueNone;
+    NullableCSSValue value = element->inlineStyle()->getPropertyCSSValue(CSSPropertyDisplay);
+    return value && value->isPrimitiveValue() && toCSSPrimitiveValue(value)->getValueID() == CSSValueNone;
 }
 
 TEST_F(PluginPlaceholderImplTest, Closeable)