Support author Shadow DOM for INPUT elements

Source/core/dom/Element.cpp

 /*
  * 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)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1601 matching lines @@
 {
     ElementShadow* elementShadow = shadow();
     if (!elementShadow)
         return 0;
     ShadowRoot* shadowRoot = elementShadow->youngestShadowRoot();
     if (shadowRoot->type() == ShadowRoot::AuthorShadowRoot)
         return shadowRoot;
     return 0;
 }
 
+void Element::didAddShadowRoot(ShadowRoot&)
+{
+}
+
 ShadowRoot* Element::userAgentShadowRoot() const
 {
     if (ElementShadow* elementShadow = shadow()) {
         if (ShadowRoot* shadowRoot = elementShadow->oldestShadowRoot()) {
             ASSERT(shadowRoot->type() == ShadowRoot::UserAgentShadowRoot);
             return shadowRoot;
         }
     }
 
     return 0;
@@ skipping 1993 matching lines @@
     return 0;
 }
 
 Attribute* UniqueElementData::attributeItem(unsigned index)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(index < length());
     return &m_attributeVector.at(index);
 }
 
 } // namespace WebCore