Support author Shadow DOM for INPUT elements

Source/core/html/HTMLTextFormControlElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2009, 2010, 2011 Google 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 99 matching lines @@
 
     void setLastChangeWasNotUserEdit() { m_lastChangeWasUserEdit = false; }
 
     String valueWithHardLineBreaks() const;
 
 private:
     int computeSelectionStart() const;
     int computeSelectionEnd() const;
     TextFieldSelectionDirection computeSelectionDirection() const;
 
-    // FIXME: Author shadows should be allowed
-    // https://bugs.webkit.org/show_bug.cgi?id=92608
-    virtual bool areAuthorShadowsAllowed() const OVERRIDE { return false; }
-
     virtual void dispatchFocusEvent(Element* oldFocusedElement, FocusDirection) OVERRIDE;
     virtual void dispatchBlurEvent(Element* newFocusedElement) OVERRIDE;
 
     // Returns true if user-editable value is empty. Used to check placeholder visibility.
     virtual bool isEmptyValue() const = 0;
     // Returns true if suggested value is empty. Used to check placeholder visibility.
     virtual bool isEmptySuggestedValue() const { return true; }
     // Called in dispatchFocusEvent(), after placeholder process, before calling parent's dispatchFocusEvent().
     virtual void handleFocusEvent(Element* /* oldFocusedNode */, FocusDirection) { }
     // Called in dispatchBlurEvent(), after placeholder process, before calling parent's dispatchBlurEvent().
@@ skipping 16 matching lines @@
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!node || isHTMLTextFormControlElement(node));
     return static_cast<HTMLTextFormControlElement*>(node);
 }
 
 HTMLTextFormControlElement* enclosingTextFormControl(const Position&);
 
 } // namespace
 
 #endif