RefCounted types should not have public destructors

chrome/browser/net/load_timing_observer.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_NET_LOAD_TIMING_OBSERVER_H_
 #define CHROME_BROWSER_NET_LOAD_TIMING_OBSERVER_H_
 #pragma once
 
 #include "base/gtest_prod_util.h"
 #include "base/hash_tables.h"
 #include "base/time.h"
 #include "net/base/net_log.h"
 #include "webkit/glue/resource_loader_bridge.h"
 
 namespace content {
-struct ResourceResponse;
+class ResourceResponse;
 }
 
 namespace net {
 class URLRequest;
 }  // namespace net
 
 // LoadTimingObserver watches the NetLog event stream and collects the network
 // timing information.
 //
 // LoadTimingObserver lives completely on the IOThread and ignores events from
@@ skipping 95 matching lines @@
   HTTPStreamJobToRecordMap http_stream_job_to_record_;
   ConnectJobToRecordMap connect_job_to_record_;
   SocketToRecordMap socket_to_record_;
   uint32 last_connect_job_id_;
   ConnectJobRecord last_connect_job_record_;
 
   DISALLOW_COPY_AND_ASSIGN(LoadTimingObserver);
 };
 
 #endif  // CHROME_BROWSER_NET_LOAD_TIMING_OBSERVER_H_