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

Source/core/html/HTMLSelectElement.cpp

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
@@ skipping 33 matching lines @@
 #include "core/html/HTMLOptionsCollection.h"
 #include "core/page/EventHandler.h"
 #include "core/page/Frame.h"
 #include "core/page/Page.h"
 #include "core/page/SpatialNavigation.h"
 #include "core/platform/LocalizedStrings.h"
 #include "core/platform/PlatformMouseEvent.h"
 #include "core/rendering/RenderListBox.h"
 #include "core/rendering/RenderMenuList.h"
 #include "core/rendering/RenderTheme.h"
-#include <wtf/text/StringBuilder.h>
-#include <wtf/unicode/Unicode.h>
 
 using namespace std;
 using namespace WTF::Unicode;
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 // Upper limit agreed upon with representatives of Opera and Mozilla.
 static const unsigned maxSelectItems = 10000;
@@ skipping 1512 matching lines @@
 {
     if (!value) {
         ec = TYPE_MISMATCH_ERR;
         return false;
     }
     setOption(index, value.get(), ec);
     return true;
 }
 
 } // namespace