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diff --git a/core/fpdfdoc/cpdf_actionfields.h b/core/fpdfdoc/cpdf_actionfields.h
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+++ b/core/fpdfdoc/cpdf_actionfields.h
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+// Copyright 2016 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 CORE_FPDFDOC_CPDF_ACTIONFIELDS_H_
+#define CORE_FPDFDOC_CPDF_ACTIONFIELDS_H_
+
+#include <stddef.h>
+
+#include <vector>
+
+class CPDF_Action;
+class CPDF_Object;
+
+class CPDF_ActionFields {
+ public:
+  explicit CPDF_ActionFields(const CPDF_Action* pAction) : m_pAction(pAction) {}
+
+  size_t GetFieldsCount() const;
+  std::vector<CPDF_Object*> GetAllFields() const;
+  CPDF_Object* GetField(size_t iIndex) const;
+
+ private:
+  const CPDF_Action* const m_pAction;
+};
+
+#endif  // CORE_FPDFDOC_CPDF_ACTIONFIELDS_H_