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diff --git a/core/fpdfdoc/cpdf_viewerpreferences.h b/core/fpdfdoc/cpdf_viewerpreferences.h
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+++ b/core/fpdfdoc/cpdf_viewerpreferences.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_VIEWERPREFERENCES_H_
+#define CORE_FPDFDOC_CPDF_VIEWERPREFERENCES_H_
+
+#include "core/fxcrt/include/fx_string.h"
+#include "core/fxcrt/include/fx_system.h"
+
+class CPDF_Array;
+class CPDF_Dictionary;
+class CPDF_Document;
+
+class CPDF_ViewerPreferences {
+ public:
+  explicit CPDF_ViewerPreferences(CPDF_Document* pDoc);
+  ~CPDF_ViewerPreferences();
+
+  FX_BOOL IsDirectionR2L() const;
+  FX_BOOL PrintScaling() const;
+  int32_t NumCopies() const;
+  CPDF_Array* PrintPageRange() const;
+  CFX_ByteString Duplex() const;
+
+ private:
+  CPDF_Dictionary* GetViewerPreferences() const;
+
+  CPDF_Document* const m_pDoc;
+};
+
+#endif  // CORE_FPDFDOC_CPDF_VIEWERPREFERENCES_H_