Remove unused includes from core/{editing,fileapi,history,html}

Source/core/html/ValidityState.cpp

 /*
  * This file is part of the WebKit project.
  *
  * Copyright (C) 2009 Michelangelo De Simone <micdesim@gmail.com>
  * Copyright (C) 2010 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #include "config.h"
 #include "core/html/ValidityState.h"
 
-#include "HTMLNames.h"
-#include "core/html/HTMLInputElement.h"
-#include "core/html/HTMLSelectElement.h"
-#include "core/html/HTMLTextAreaElement.h"
-#include "core/html/parser/HTMLTreeBuilder.h"
-#include "core/platform/LocalizedStrings.h"
-#include <wtf/StdLibExtras.h>
-
 namespace WebCore {
 
-using namespace HTMLNames;
-
 String ValidityState::validationMessage() const
 {
     return m_control->validationMessage();
 }
 
 bool ValidityState::valueMissing() const
 {
     return m_control->valueMissing();
 }
 
@@ skipping 36 matching lines @@
 {
     return m_control->customError();
 }
 
 bool ValidityState::valid() const
 {
     return m_control->valid();
 }
 
 } // namespace