Review and cleanup lint warnings.

fpdfsdk/src/javascript/util.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 "fpdfsdk/src/javascript/util.h"
 
 #include <time.h>
 
+#include <string>
+#include <vector>
+
 #include "core/include/fxcrt/fx_ext.h"
 #include "fpdfsdk/include/javascript/IJavaScript.h"
 #include "fpdfsdk/src/javascript/JS_Context.h"
 #include "fpdfsdk/src/javascript/JS_Define.h"
 #include "fpdfsdk/src/javascript/JS_EventHandler.h"
 #include "fpdfsdk/src/javascript/JS_Object.h"
 #include "fpdfsdk/src/javascript/JS_Runtime.h"
 #include "fpdfsdk/src/javascript/JS_Value.h"
 #include "fpdfsdk/src/javascript/PublicMethods.h"
 #include "fpdfsdk/src/javascript/resource.h"
@@ skipping 498 matching lines @@
   int iSize = params.size();
   if (iSize == 0)
     return FALSE;
   int nByte = params[0].ToInt();
   unsigned char cByte = (unsigned char)nByte;
   CFX_WideString csValue;
   csValue.Format(L"%c", cByte);
   vRet = csValue.c_str();
   return TRUE;
 }