diff --git a/core/fpdfdoc/cpdf_aaction.h b/core/fpdfdoc/cpdf_aaction.h
index edd3539..c3c65e8 100644
--- a/core/fpdfdoc/cpdf_aaction.h
+++ b/core/fpdfdoc/cpdf_aaction.h
@@ -8,6 +8,7 @@
 #define CORE_FPDFDOC_CPDF_AACTION_H_
 
 #include "core/fpdfdoc/cpdf_action.h"
+#include "core/fxcrt/retain_ptr.h"
 
 class CPDF_Dictionary;
 
@@ -50,7 +51,7 @@
   static bool IsUserClick(AActionType eType);
 
  private:
-  UnownedPtr<const CPDF_Dictionary> const m_pDict;
+  RetainPtr<const CPDF_Dictionary> const m_pDict;
 };
 
 #endif  // CORE_FPDFDOC_CPDF_AACTION_H_
diff --git a/core/fpdfdoc/cpdf_action.h b/core/fpdfdoc/cpdf_action.h
index f0f8679..f41d917 100644
--- a/core/fpdfdoc/cpdf_action.h
+++ b/core/fpdfdoc/cpdf_action.h
@@ -9,6 +9,7 @@
 
 #include "core/fpdfdoc/cpdf_dest.h"
 #include "core/fxcrt/fx_string.h"
+#include "core/fxcrt/retain_ptr.h"
 
 class CPDF_Dictionary;
 class CPDF_Document;
@@ -54,7 +55,7 @@
   CPDF_Action GetSubAction(size_t iIndex) const;
 
  private:
-  UnownedPtr<const CPDF_Dictionary> const m_pDict;
+  RetainPtr<const CPDF_Dictionary> const m_pDict;
 };
 
 #endif  // CORE_FPDFDOC_CPDF_ACTION_H_
diff --git a/core/fpdfdoc/cpdf_bookmark.h b/core/fpdfdoc/cpdf_bookmark.h
index 47fd071..d38ce0c 100644
--- a/core/fpdfdoc/cpdf_bookmark.h
+++ b/core/fpdfdoc/cpdf_bookmark.h
@@ -10,7 +10,7 @@
 #include "core/fpdfdoc/cpdf_action.h"
 #include "core/fpdfdoc/cpdf_dest.h"
 #include "core/fxcrt/fx_string.h"
-#include "core/fxcrt/unowned_ptr.h"
+#include "core/fxcrt/retain_ptr.h"
 
 class CPDF_Dictionary;
 class CPDF_Document;
@@ -29,7 +29,7 @@
   CPDF_Action GetAction() const;
 
  private:
-  UnownedPtr<const CPDF_Dictionary> m_pDict;
+  RetainPtr<const CPDF_Dictionary> m_pDict;
 };
 
 #endif  // CORE_FPDFDOC_CPDF_BOOKMARK_H_
diff --git a/core/fpdfdoc/cpdf_dest.h b/core/fpdfdoc/cpdf_dest.h
index e6e673e..298d753 100644
--- a/core/fpdfdoc/cpdf_dest.h
+++ b/core/fpdfdoc/cpdf_dest.h
@@ -9,7 +9,7 @@
 
 #include "core/fxcrt/fx_string.h"
 #include "core/fxcrt/fx_system.h"
-#include "core/fxcrt/unowned_ptr.h"
+#include "core/fxcrt/retain_ptr.h"
 
 class CPDF_Document;
 class CPDF_Array;
@@ -39,7 +39,7 @@
               float* pZoom) const;
 
  private:
-  UnownedPtr<const CPDF_Array> const m_pArray;
+  RetainPtr<const CPDF_Array> const m_pArray;
 };
 
 #endif  // CORE_FPDFDOC_CPDF_DEST_H_
diff --git a/core/fxcrt/retain_ptr.h b/core/fxcrt/retain_ptr.h
index 683ea74..d629bc4 100644
--- a/core/fxcrt/retain_ptr.h
+++ b/core/fxcrt/retain_ptr.h
@@ -115,14 +115,14 @@
   Retainable(const Retainable& that) = delete;
   Retainable& operator=(const Retainable& that) = delete;
 
-  void Retain() { ++m_nRefCount; }
-  void Release() {
+  void Retain() const { ++m_nRefCount; }
+  void Release() const {
     ASSERT(m_nRefCount > 0);
     if (--m_nRefCount == 0)
       delete this;
   }
 
-  intptr_t m_nRefCount = 0;
+  mutable intptr_t m_nRefCount = 0;
 };
 
 }  // namespace fxcrt