Implement ConsumeShorthandViaLonghand to parse shorthand by calling longhand ParseSingleValue

third_party/WebKit/Source/core/css/parser/CSSPropertyParser.h

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008, 2009, 2010 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 - 2010  Torch Mobile (Beijing) Co. Ltd. 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
@@ skipping 70 matching lines @@
                                    const CSSValue&,
                                    bool);
 
   bool ConsumeBorder(bool important);
 
   bool ParseShorthand(CSSPropertyID, bool important);
   bool ConsumeShorthandGreedily(const StylePropertyShorthand&, bool important);
   bool Consume2Values(const StylePropertyShorthand&, bool important);
   bool Consume4Values(const StylePropertyShorthand&, bool important);
 
+  enum class LonghandsOrder { kNoOrder, kOrderBy2Values, kOrderBy4Values };
+
+  bool ConsumeShorthandViaLonghand(const StylePropertyShorthand&,
+                                   bool important,
+                                   LonghandsOrder);
+
   // Legacy parsing allows <string>s for animation-name
   bool ConsumeAnimationShorthand(const StylePropertyShorthand&,
                                  bool use_legacy_parsing,
                                  bool important);
   bool ConsumeBackgroundShorthand(const StylePropertyShorthand&,
                                   bool important);
   bool ConsumeOffsetShorthand(bool important);
 
   bool ConsumeColumns(bool important);
 
@@ skipping 23 matching lines @@
   // Outputs:
   HeapVector<CSSProperty, 256>* parsed_properties_;
 };
 
 CSSPropertyID UnresolvedCSSPropertyID(StringView);
 CSSValueID CssValueKeywordID(StringView);
 
 }  // namespace blink
 
 #endif  // CSSPropertyParser_h