Simplify parseShadowValue

Source/core/css/parser/CSSPropertyParser.h

Index: Source/core/css/parser/CSSPropertyParser.h
diff --git a/Source/core/css/parser/CSSPropertyParser.h b/Source/core/css/parser/CSSPropertyParser.h
index 4f199bb0754e1cc97e8fbe871cdbc1374f578949..8bfa6cf9ed4b73a939c51eddcf6e2ac1c202cd8c 100644
--- a/Source/core/css/parser/CSSPropertyParser.h
+++ b/Source/core/css/parser/CSSPropertyParser.h
@@ -44,6 +44,7 @@ class CSSParserValueList;
 class CSSPrimitiveValue;
 class CSSProperty;
 class CSSQuadValue;
+class CSSShadowValue;
 class CSSValue;
 class CSSValueList;
 class StylePropertyShorthand;
@@ -209,7 +210,8 @@ private:
     PassRefPtrWillBeRawPtr<CSSValue> parsePaintOrder() const;
 
     // CSS3 Parsing Routines (for properties specific to CSS3)
-    PassRefPtrWillBeRawPtr<CSSValueList> parseShadow(CSSParserValueList*, CSSPropertyID);
+    bool parseShadow(CSSParserValueList*, CSSPropertyID, bool);
+    PassRefPtrWillBeRawPtr<CSSShadowValue> parseSingleShadow(CSSParserValueList*, bool allowInset = false, bool allowBreak = false, unsigned maxLength = 4);
     bool parseBorderImageShorthand(CSSPropertyID, bool important);
     PassRefPtrWillBeRawPtr<CSSValue> parseBorderImage(CSSPropertyID);
     bool parseBorderImageRepeat(RefPtrWillBeRawPtr<CSSValue>&);