Fix (nearly all) IWYU in fpdfskd/include/javascript/ headers.

fpdfsdk/include/javascript/util.h

 // 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
 
 #ifndef _UTIL_H_
 #define _UTIL_H_
 
+#include <string>  // For std::wstring.
+
+#include "JS_Define.h"
+
 class util : public CJS_EmbedObj
 {
 public:
         util(CJS_Object * pJSObject);
         virtual ~util(void);
 
 public:
         FX_BOOL printd(IFXJS_Context* cc, const CJS_Parameters& params, CJS_Value& vRet, CFX_WideString& sError);
         FX_BOOL printf(IFXJS_Context* cc, const CJS_Parameters& params, CJS_Value& vRet, CFX_WideString& sError);
         FX_BOOL printx(IFXJS_Context* cc, const CJS_Parameters& params, CJS_Value& vRet, CFX_WideString& sError);
@@ skipping 16 matching lines @@
 
         JS_STATIC_METHOD(printd, util);
         JS_STATIC_METHOD(printf, util);
         JS_STATIC_METHOD(printx, util);
         JS_STATIC_METHOD(scand, util);
         JS_STATIC_METHOD(byteToChar, util);
 };
 
 FX_INT64 FX_atoi64(const char *nptr);
 #endif //_UTIL_H_