Review and cleanup lint warnings.

xfa/src/fxfa/app/xfa_ffwidgethandler.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "xfa/src/fxfa/app/xfa_ffwidgethandler.h"
 
+#include <vector>
+
 #include "xfa/src/fxfa/app/xfa_ffchoicelist.h"
 #include "xfa/src/fxfa/app/xfa_ffdoc.h"
 #include "xfa/src/fxfa/app/xfa_ffdocview.h"
 #include "xfa/src/fxfa/app/xfa_fffield.h"
 #include "xfa/src/fxfa/app/xfa_ffwidget.h"
 #include "xfa/src/fxfa/app/xfa_fwladapter.h"
 #include "xfa/src/fxfa/parser/xfa_parser.h"
 
 CXFA_FFWidgetHandler::CXFA_FFWidgetHandler(CXFA_FFDocView* pDocView)
     : m_pDocView(pDocView) {}
@@ skipping 604 matching lines @@
   return static_cast<CXFA_FFWidget*>(hWidget)
       ->GetSuggestWords(pointf, sSuggest);
 }
 FX_BOOL CXFA_FFMenuHandler::ReplaceSpellCheckWord(
     IXFA_Widget* hWidget,
     CFX_PointF pointf,
     const CFX_ByteStringC& bsReplace) {
   return static_cast<CXFA_FFWidget*>(hWidget)
       ->ReplaceSpellCheckWord(pointf, bsReplace);
 }