Merge to XFA: Fix (nearly all) IWYU in fpdfskd/include/javascript/ headers.

fpdfsdk/include/javascript/Field.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 _FIELD_H_
 #define _FIELD_H_
 
+#include <string>  // For std::wstring.
+
+// TODO(tsepez): include PWL_Wnd.h for PWL_Color after fixing its IWYU.
+#include "JS_Define.h"
+
 class Document;
 
 enum FIELD_PROP
 {
         FP_ALIGNMENT,
         FP_BORDERSTYLE,
         FP_BUTTONALIGNX,
         FP_BUTTONALIGNY,
         FP_BUTTONFITBOUNDS,
         FP_BUTTONPOSITION,
@@ skipping 326 matching lines @@
         JS_STATIC_METHOD(signatureGetModifications, Field);
         JS_STATIC_METHOD(signatureGetSeedValue, Field);
         JS_STATIC_METHOD(signatureInfo, Field);
         JS_STATIC_METHOD(signatureSetSeedValue, Field);
         JS_STATIC_METHOD(signatureSign, Field);
         JS_STATIC_METHOD(signatureValidate, Field);
 };
 
 #endif //_FIELD_H_