Remove assorted unnecessary includes in core/layout/

third_party/WebKit/Source/core/layout/LayoutTextControl.cpp

 /**
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  *           (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * 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 "core/layout/LayoutTextControl.h"
 
 #include "core/dom/StyleChangeReason.h"
 #include "core/html/HTMLTextFormControlElement.h"
 #include "core/layout/HitTestResult.h"
-#include "core/layout/LayoutTheme.h"
-#include "core/layout/TextRunConstructor.h"
 #include "platform/scroll/ScrollbarTheme.h"
-#include "wtf/text/CharacterNames.h"
 
 namespace blink {
 
 LayoutTextControl::LayoutTextControl(HTMLTextFormControlElement* element)
     : LayoutBlockFlow(element)
 {
     ASSERT(element);
 }
 
 LayoutTextControl::~LayoutTextControl()
@@ skipping 241 matching lines @@
     HTMLElement* placeholder = toHTMLTextFormControlElement(node())->placeholderElement();
     LayoutObject* placeholderLayoutObject = placeholder ? placeholder->layoutObject() : nullptr;
     if (!placeholderLayoutObject)
         return nullptr;
     if (relayoutChildren)
         layoutScope.setChildNeedsLayout(placeholderLayoutObject);
     return placeholderLayoutObject;
 }
 
 } // namespace blink