CSSValue Immediates: Replace CSSPrimitiveValue usage with const references

Source/core/css/CSSShadowValue.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 15 matching lines @@
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class CSSPrimitiveValue;
 
 // Used for text-shadow and box-shadow
 class CORE_EXPORT CSSShadowValue : public CSSValueObject {
 public:
-    static PassRefPtrWillBeRawPtr<CSSShadowValue> create(NullableCSSValue x,
-        NullableCSSValue y,
-        NullableCSSValue blur,
-        NullableCSSValue spread,
-        NullableCSSValue style,
-        NullableCSSValue color)
+    static PassRefPtrWillBeRawPtr<CSSShadowValue> create(const NullableCSSValue& x,
+        const NullableCSSValue& y,
+        const NullableCSSValue& blur,
+        const NullableCSSValue& spread,
+        const NullableCSSValue& style,
+        const NullableCSSValue& color)
     {
         return adoptRefWillBeNoop(new CSSShadowValue(x, y, blur, spread, style, color));
     }
 
     String customCSSText() const;
 
     bool equals(const CSSShadowValue&) const;
 
     NullableCSSValue x;
     NullableCSSValue y;
     NullableCSSValue blur;
     NullableCSSValue spread;
     NullableCSSValue style;
     NullableCSSValue color;
 
     DECLARE_TRACE_AFTER_DISPATCH();
 
 private:
-    CSSShadowValue(NullableCSSValue x,
-        NullableCSSValue y,
-        NullableCSSValue blur,
-        NullableCSSValue spread,
-        NullableCSSValue style,
-        NullableCSSValue color);
+    CSSShadowValue(const NullableCSSValue& x,
+        const NullableCSSValue& y,
+        const NullableCSSValue& blur,
+        const NullableCSSValue& spread,
+        const NullableCSSValue& style,
+        const NullableCSSValue& color);
 };
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSShadowValue, isShadowValue());
 
 } // namespace
 
 #endif