Revert of Unify some code

core/fpdfapi/parser/cpdf_parser.h

Index: core/fpdfapi/parser/cpdf_parser.h
diff --git a/core/fpdfapi/parser/cpdf_parser.h b/core/fpdfapi/parser/cpdf_parser.h
index b8ce7ab2948da0d3d2c3a8c6a1421b2d4570485e..3be157a1a2065d5bf6c67862d1f5ff53ed6adec3 100644
--- a/core/fpdfapi/parser/cpdf_parser.h
+++ b/core/fpdfapi/parser/cpdf_parser.h
@@ -19,7 +19,6 @@
 class CPDF_Dictionary;
 class CPDF_Document;
 class CPDF_IndirectObjectHolder;
-class CPDF_Linearized;
 class CPDF_Object;
 class CPDF_SecurityHandler;
 class CPDF_StreamAcc;
@@ -89,7 +88,7 @@
       uint32_t objnum,
       FX_FILESIZE* pResultPos);
 
-  uint32_t GetFirstPageNo() const;
+  uint32_t GetFirstPageNo() const { return m_dwFirstPageNo; }
 
  protected:
   struct ObjectInfo {
@@ -158,7 +157,8 @@
   std::set<FX_FILESIZE> m_SortedOffset;
   std::vector<CPDF_Dictionary*> m_Trailers;
   bool m_bVersionUpdated;
-  std::unique_ptr<CPDF_Linearized> m_pLinearized;
+  CPDF_Object* m_pLinearized;
+  uint32_t m_dwFirstPageNo;
   uint32_t m_dwXrefStartObjNum;
 
   // A map of object numbers to indirect streams. Map owns the streams.