Add expansion of shorthands with custom properties to longhands using a pending substition value.

third_party/WebKit/Source/core/css/resolver/StyleResolverState.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef StyleResolverState_h
 #define StyleResolverState_h
 
 #include "core/CSSPropertyNames.h"
 #include "core/CoreExport.h"
 #include "core/animation/css/CSSAnimationUpdate.h"
+#include "core/css/CSSPendingSubstitutionValue.h"
 #include "core/css/CSSSVGDocumentValue.h"
 #include "core/css/CSSToLengthConversionData.h"
 #include "core/css/resolver/CSSToStyleMap.h"
 #include "core/css/resolver/ElementResolveContext.h"
 #include "core/css/resolver/ElementStyleResources.h"
 #include "core/css/resolver/FontBuilder.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/style/CachedUAStyle.h"
 #include "core/style/ComputedStyle.h"
@@ skipping 115 matching lines @@
         if (m_style->setTextOrientation(textOrientation))
             m_fontBuilder.didChangeTextOrientation();
     }
 
     void setHasDirAutoAttribute(bool value) { m_hasDirAutoAttribute = value; }
     bool hasDirAutoAttribute() const { return m_hasDirAutoAttribute; }
 
     void setCustomPropertySetForApplyAtRule(const String&, StylePropertySet*);
     StylePropertySet* customPropertySetForApplyAtRule(const String&);
 
+    HeapHashMap<CSSPropertyID, Member<const CSSValue>>& parsedPropertiesForPendingSubstitution(const CSSPendingSubstitutionValue&);
+
 private:
     ElementResolveContext m_elementContext;
     Member<Document> m_document;
 
     // m_style is the primary output for each element's style resolve.
     RefPtr<ComputedStyle> m_style;
 
     CSSToLengthConversionData m_cssToLengthConversionData;
 
     // m_parentStyle is not always just ElementResolveContext::parentStyle,
     // so we keep it separate.
     RefPtr<ComputedStyle> m_parentStyle;
 
     CSSAnimationUpdate m_animationUpdate;
 
     bool m_applyPropertyToRegularStyle;
     bool m_applyPropertyToVisitedLinkStyle;
     bool m_hasDirAutoAttribute;
 
     FontBuilder m_fontBuilder;
 
     std::unique_ptr<CachedUAStyle> m_cachedUAStyle;
 
     ElementStyleResources m_elementStyleResources;
 
     HeapHashMap<String, Member<StylePropertySet>> m_customPropertySetsForApplyAtRule;
+
+    HeapHashMap<Member<const CSSPendingSubstitutionValue>, Member<HeapHashMap<CSSPropertyID, Member<const CSSValue>>>> m_parsedPropertiesForPendingSubstitution;
+
 };
 
 } // namespace blink
 
 #endif // StyleResolverState_h