Unify some code

core/fpdfapi/parser/cpdf_data_avail.h

Index: core/fpdfapi/parser/cpdf_data_avail.h
diff --git a/core/fpdfapi/parser/cpdf_data_avail.h b/core/fpdfapi/parser/cpdf_data_avail.h
index 138fe1e3d843856f3a90d0c4da018a8d3d12543e..eeb984607648cff2d48ef299dd65fa19651bf2e2 100644
--- a/core/fpdfapi/parser/cpdf_data_avail.h
+++ b/core/fpdfapi/parser/cpdf_data_avail.h
@@ -16,6 +16,7 @@
 class CPDF_Dictionary;
 class CPDF_HintTables;
 class CPDF_IndirectObjectHolder;
+class CPDF_Linearized;
 class CPDF_Parser;
 
 enum PDF_DATAAVAIL_STATUS {
@@ -199,7 +200,7 @@ class CPDF_DataAvail final {
   CPDF_Object* m_pRoot;
   uint32_t m_dwRootObjNum;
   uint32_t m_dwInfoObjNum;
-  CPDF_Object* m_pLinearized;
+  std::unique_ptr<CPDF_Linearized> m_pLinearized;
   CPDF_Object* m_pTrailer;
   FX_BOOL m_bDocAvail;
   FX_FILESIZE m_dwHeaderOffset;
@@ -221,7 +222,6 @@ class CPDF_DataAvail final {
   CFX_ArrayTemplate<uint32_t> m_PageObjList;
   uint32_t m_PagesObjNum;
   FX_BOOL m_bLinearized;
-  uint32_t m_dwFirstPageNo;
   FX_BOOL m_bLinearedDataOK;
   FX_BOOL m_bMainXRefLoadTried;
   FX_BOOL m_bMainXRefLoadedOK;