Revert of Remove CPDF_Object::Release() in favor of direct delete

core/fpdfapi/parser/cpdf_string.h

Index: core/fpdfapi/parser/cpdf_string.h
diff --git a/core/fpdfapi/parser/cpdf_string.h b/core/fpdfapi/parser/cpdf_string.h
index 49834c03f2bbc5ab8c2ee656426490d114b5d4fa..efc6d076c7afdeb04e6a50c567b2c0c3fb953f18 100644
--- a/core/fpdfapi/parser/cpdf_string.h
+++ b/core/fpdfapi/parser/cpdf_string.h
@@ -16,7 +16,6 @@
   CPDF_String();
   CPDF_String(const CFX_ByteString& str, bool bHex);
   explicit CPDF_String(const CFX_WideString& str);
-  ~CPDF_String() override;
 
   // CPDF_Object.
   Type GetType() const override;
@@ -31,6 +30,8 @@
   bool IsHex() const { return m_bHex; }
 
  protected:
+  ~CPDF_String() override;
+
   CFX_ByteString m_String;
   bool m_bHex;
 };