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

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

 /*
  * 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,
@@ skipping 68 matching lines @@
 void StyleResolverState::setCustomPropertySetForApplyAtRule(const String& string, StylePropertySet* customPropertySet)
 {
     m_customPropertySetsForApplyAtRule.set(string, customPropertySet);
 }
 
 StylePropertySet* StyleResolverState::customPropertySetForApplyAtRule(const String& string)
 {
     return m_customPropertySetsForApplyAtRule.get(string);
 }
 
+HeapHashMap<CSSPropertyID, Member<const CSSValue>>& StyleResolverState::parsedPropertiesForPendingSubstitution(const CSSValue& psv)

[Timothy Loh, 2016/06/27 04:19:10]

no abbreviations in blink :)

[Andy Mutton, 2016/06/28 03:18:51]

Done.

+{
+    HeapHashMap<CSSPropertyID, Member<const CSSValue>>* map = m_parsedPropertiesForPendingSubstitution.get(&psv);
+    if (!map) {
+        map = new HeapHashMap<CSSPropertyID, Member<const CSSValue>>;
+        m_parsedPropertiesForPendingSubstitution.set(&psv, map);
+    }
+    return *map;
+}
+
 } // namespace blink