RefCounted types should not have public destructors, net/

net/dns/dns_transaction.cc

Index: net/dns/dns_transaction.cc
diff --git a/net/dns/dns_transaction.cc b/net/dns/dns_transaction.cc
index dd7b659e306d19cf8cd22bc0000ed419d15682b3..2073b7f4cb5216962a17257ea174a57cedc51a1b 100644
--- a/net/dns/dns_transaction.cc
+++ b/net/dns/dns_transaction.cc
@@ -64,6 +64,8 @@ class StartParameters : public NetLog::EventParameters {
   }
 
  private:
+  virtual ~StartParameters() {}
+
   const std::string hostname_;
   const uint16 qtype_;
 };
@@ -82,6 +84,8 @@ class ResponseParameters : public NetLog::EventParameters {
   }
 
  private:
+  virtual ~ResponseParameters() {}
+
   const int rcode_;
   const int answer_count_;
   const NetLog::Source source_;