Remove xfa_fm2js.h and IWYU.

xfa/src/fxfa/src/fm2js/xfa_fm2jscontext.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/src/fm2js/xfa_fm2jscontext.h"
+
 #include <time.h>
 
 #include "core/include/fxcrt/fx_ext.h"
+#include "xfa/src/fgas/include/fx_locale.h"
 #include "xfa/src/fxfa/src/common/fxfa_localevalue.h"
-#include "xfa/src/fxfa/src/fm2js/xfa_fm2js.h"
+#include "xfa/src/fxfa/src/common/xfa_document.h"
+#include "xfa/src/fxfa/src/common/xfa_fm2jsapi.h"
+#include "xfa/src/fxfa/src/common/xfa_parser.h"
 
 #define FINANCIAL_PRECISION 0.00000001
 
 namespace {
 
 struct XFA_FMHtmlReserveCode {
   uint32_t m_uCode;
   const FX_WCHAR* m_htmlReserve;
 };
 struct XFA_FMHtmlHashedReserveCode {
@@ skipping 7187 matching lines @@
   FXSYS_assert(pAppProvider);
   CFX_WideString wsFormat;
   pAppProvider->LoadString(iStringID, wsFormat);
   CFX_WideString wsMessage;
   va_list arg_ptr;
   va_start(arg_ptr, iStringID);
   wsMessage.FormatV((const FX_WCHAR*)wsFormat, arg_ptr);
   va_end(arg_ptr);
   FXJSE_ThrowMessage("", FX_UTF8Encode(wsMessage, wsMessage.GetLength()));
 }