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diff --git a/core/fpdfapi/font/cpdf_cid2unicodemap.h b/core/fpdfapi/font/cpdf_cid2unicodemap.h
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+++ b/core/fpdfapi/font/cpdf_cid2unicodemap.h
@@ -0,0 +1,29 @@
+// Copyright 2017 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_FPDFAPI_FONT_CPDF_CID2UNICODEMAP_H_
+#define CORE_FPDFAPI_FONT_CPDF_CID2UNICODEMAP_H_
+
+#include "core/fpdfapi/font/cpdf_cidfont.h"
+
+class CPDF_CMapManager;
+
+class CPDF_CID2UnicodeMap {
+ public:
+  CPDF_CID2UnicodeMap();
+  ~CPDF_CID2UnicodeMap();
+
+  bool IsLoaded();
+  void Load(CPDF_CMapManager* pMgr, CIDSet charset, bool bPromptCJK);
+  wchar_t UnicodeFromCID(uint16_t CID);
+
+ private:
+  CIDSet m_Charset;
+  const uint16_t* m_pEmbeddedMap;
+  uint32_t m_EmbeddedCount;
+};
+
+#endif  // CORE_FPDFAPI_FONT_CPDF_CID2UNICODEMAP_H_