Use DEFINE_CSS_VALUE_TYPE_CASTS() for SVGColor, SVGPaint, and TextCloneCSSValue

Source/core/svg/SVGColor.h

Index: Source/core/svg/SVGColor.h
diff --git a/Source/core/svg/SVGColor.h b/Source/core/svg/SVGColor.h
index acdfbebe0e526364f96b1bae11b59693344bcfb4..756868829998bc7b4a032b474143f2bda2bd8c30 100644
--- a/Source/core/svg/SVGColor.h
+++ b/Source/core/svg/SVGColor.h
@@ -93,21 +93,7 @@ private:
     SVGColorType m_colorType;
 };
 
-// This will catch anyone doing an unnecessary cast.
-SVGColor* toSVGColor(const SVGColor*);
-
-inline SVGColor* toSVGColor(CSSValue* value)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!value || value->isSVGColor());
-    return static_cast<SVGColor*>(value);
-}
-
-inline const SVGColor* toSVGColor(const CSSValue* value)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!value || value->isSVGColor());
-    return static_cast<const SVGColor*>(value);
-}
-
+DEFINE_CSS_VALUE_TYPE_CASTS(SVGColor, isSVGColor());
 
 } // namespace WebCore