Add Element.attachShadow under the ShadowDOMV1 runtime flag

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 311 matching lines @@
     void setNeedsCompositingUpdate();
 
     bool supportsStyleSharing() const;
 
     ElementShadow* shadow() const;
     ElementShadow& ensureShadow();
     // If type of ShadowRoot (either closed or open) is explicitly specified, creation of multiple
     // shadow roots is prohibited in any combination and throws an exception. Multiple shadow roots
     // are allowed only when createShadowRoot() is used without any parameters from JavaScript.
     PassRefPtrWillBeRawPtr<ShadowRoot> createShadowRoot(const ScriptState*, ExceptionState&);
-    PassRefPtrWillBeRawPtr<ShadowRoot> createShadowRoot(const ScriptState*, const ShadowRootInit&, ExceptionState&);
+    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& ensureUserAgentShadowRoot();
@@ skipping 560 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