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

third_party/WebKit/Source/core/dom/Node.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004-2011, 2014 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 904 matching lines @@
   bool isUserActionElementActive() const;
   bool isUserActionElementInActiveChain() const;
   bool isUserActionElementDragged() const;
   bool isUserActionElementHovered() const;
   bool isUserActionElementFocused() const;
 
   void recalcDistribution();
 
   void setStyleChange(StyleChangeType);
 
-  virtual ComputedStyle* nonLayoutObjectComputedStyle() const {
-    return nullptr;
-  }
-
   virtual const ComputedStyle* virtualEnsureComputedStyle(
       PseudoId = PseudoIdNone);
 
   void trackForDebugging();
 
   const HeapVector<TraceWrapperMember<MutationObserverRegistration>>*
   mutationObserverRegistry();
   const HeapHashSet<TraceWrapperMember<MutationObserverRegistration>>*
   transientMutationObserverRegistry();
 
@@ skipping 81 matching lines @@
 }  // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showNode(const blink::Node*);
 void showTree(const blink::Node*);
 void showNodePath(const blink::Node*);
 #endif
 
 #endif  // Node_h