Support display: contents for elements, first-line and first-letter pseudos.

third_party/WebKit/Source/core/css/resolver/StyleResolver.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.
  *
@@ skipping 64 matching lines @@
  public:
   static StyleResolver* create(Document& document) {
     return new StyleResolver(document);
   }
   ~StyleResolver();
   void dispose();
 
   PassRefPtr<ComputedStyle> styleForElement(
       Element*,
       const ComputedStyle* parentStyle = 0,
+      const ComputedStyle* layoutParentStyle = 0,

[rune, 2017/01/27 13:09:23]

nullptr

[emilio, 2017/01/27 22:13:15]

Good call, I'll change both.

[rune, 2017/02/06 22:40:44]

Acknowledged.

       StyleSharingBehavior = AllowStyleSharing,
       RuleMatchingBehavior = MatchAllRules);
 
   static PassRefPtr<AnimatableValue> createAnimatableValueSnapshot(
       Element&,
       const ComputedStyle& baseStyle,
       const ComputedStyle* parentStyle,
       CSSPropertyID,
       const CSSValue*);
 
   PassRefPtr<ComputedStyle> pseudoStyleForElement(
       Element*,
       const PseudoStyleRequest&,
-      const ComputedStyle* parentStyle);
+      const ComputedStyle* parentStyle,
+      const ComputedStyle* layoutParentStyle);
 
   PassRefPtr<ComputedStyle> styleForPage(int pageIndex);
   PassRefPtr<ComputedStyle> styleForText(Text*);
 
   static PassRefPtr<ComputedStyle> styleForDocument(Document&);
 
   // TODO(esprehn): StyleResolver should probably not contain tree walking
   // state, instead we should pass a context object during recalcStyle.
   SelectorFilter& selectorFilter() { return m_selectorFilter; }
 
@@ skipping 205 matching lines @@
   bool m_wasViewportResized = false;
 
   unsigned m_styleSharingDepth = 0;
   HeapVector<Member<StyleSharingList>, styleSharingMaxDepth>
       m_styleSharingLists;
 };
 
 }  // namespace blink
 
 #endif  // StyleResolver_h