core/include/fdpfapi cleanup Part I.

core/fpdfapi/fpdf_parser/ipdf_occontext.h

+// 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_FPDFAPI_FPDF_PARSER_IPDF_OCCONTEXT_H_
+#define CORE_FPDFAPI_FPDF_PARSER_IPDF_OCCONTEXT_H_
+
+#include "core/include/fxcrt/fx_system.h"
+
+class CPDF_Dictionary;
+class CPDF_PageObject;
+
+class IPDF_OCContext {
+ public:
+  virtual ~IPDF_OCContext();
+
+  virtual FX_BOOL CheckOCGVisible(const CPDF_Dictionary* pOCG) = 0;
+  FX_BOOL CheckObjectVisible(const CPDF_PageObject* pObj);
+};
+
+#endif  // CORE_FPDFAPI_FPDF_PARSER_IPDF_OCCONTEXT_H_