Support the essential part of Shadow DOM v1

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003-2011, 2013, 2014 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
@@ skipping 336 matching lines @@
     PassRefPtrWillBeRawPtr<ShadowRoot> attachShadow(const ScriptState*, const ShadowRootInit&, ExceptionState&);
     PassRefPtrWillBeRawPtr<ShadowRoot> createShadowRootInternal(ShadowRootType, ExceptionState&);
 
     ShadowRoot* openShadowRoot() const;
     ShadowRoot* closedShadowRoot() const;
     ShadowRoot* authorShadowRoot() const;
     ShadowRoot* userAgentShadowRoot() const;
 
     ShadowRoot* youngestShadowRoot() const;
 
+    ShadowRoot* shadowRootIfV1() const;
+
     ShadowRoot& ensureUserAgentShadowRoot();
     virtual void willAddFirstAuthorShadowRoot() { }
 
     bool isInDescendantTreeOf(const Element* shadowHost) const;
 
     const ComputedStyle* ensureComputedStyle(PseudoId = NOPSEUDO);
 
     // Methods for indicating the style is affected by dynamic updates (e.g., children changing, our position changing in our sibling list, etc.)
     bool styleAffectedByEmpty() const { return hasElementFlag(StyleAffectedByEmpty); }
     void setStyleAffectedByEmpty() { setElementFlag(StyleAffectedByEmpty); }
@@ skipping 566 matching lines @@
     static PassRefPtrWillBeRawPtr<T> create(const QualifiedName&, Document&)
 #define DEFINE_ELEMENT_FACTORY_WITH_TAGNAME(T) \
     PassRefPtrWillBeRawPtr<T> T::create(const QualifiedName& tagName, Document& document) \
     { \
         return adoptRefWillBeNoop(new T(tagName, document)); \
     }
 
 } // namespace
 
 #endif // Element_h