Split fpdfdoc/include/fpdf_doc.h into individual classes.

core/fpdfdoc/include/cpdf_filespec.h

Index: core/fpdfdoc/include/cpdf_filespec.h
diff --git a/core/fpdfdoc/include/cpdf_filespec.h b/core/fpdfdoc/include/cpdf_filespec.h
new file mode 100644
index 0000000000000000000000000000000000000000..06badbaa5e55d6fea1168b4f01571b9f8f98974a
--- /dev/null
+++ b/core/fpdfdoc/include/cpdf_filespec.h
@@ -0,0 +1,35 @@
+// 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_INCLUDE_CPDF_FILESPEC_H_
+#define CORE_FPDFDOC_INCLUDE_CPDF_FILESPEC_H_
+
+#include "core/fxcrt/include/fx_string.h"
+
+class CPDF_Object;
+
+class CPDF_FileSpec {
+ public:
+  CPDF_FileSpec();
+  explicit CPDF_FileSpec(CPDF_Object* pObj) : m_pObj(pObj) {}
+
+  // Convert a platform dependent file name into pdf format.
+  static CFX_WideString EncodeFileName(const CFX_WideStringC& filepath);
+
+  // Convert a pdf file name into platform dependent format.
+  static CFX_WideString DecodeFileName(const CFX_WideStringC& filepath);
+
+  CPDF_Object* GetObj() const { return m_pObj; }
+  bool GetFileName(CFX_WideString* wsFileName) const;
+
+  // Set this file spec to refer to a file name (not a url).
+  void SetFileName(const CFX_WideStringC& wsFileName);
+
+ private:
+  CPDF_Object* m_pObj;
+};
+
+#endif  // CORE_FPDFDOC_INCLUDE_CPDF_FILESPEC_H_