Make ComponentInstaller refcounted.

chrome/browser/net/crl_set_fetcher.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_CRL_SET_FETCHER_H_
 #define CHROME_BROWSER_NET_CRL_SET_FETCHER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "components/update_client/update_client.h"
 
 namespace base {
 class DictionaryValue;
 class FilePath;
 }
 
 namespace net {
 class CRLSet;
 }
 
 namespace component_updater {
 class ComponentUpdateService;
 }
 
-class CRLSetFetcher : public update_client::ComponentInstaller,
-                      public base::RefCountedThreadSafe<CRLSetFetcher> {
+class CRLSetFetcher : public update_client::ComponentInstaller {
  public:
   CRLSetFetcher();
 
   void StartInitialLoad(component_updater::ComponentUpdateService* cus,
                         const base::FilePath& path);
 
   // DeleteFromDisk asynchronously delete the CRLSet file.
   void DeleteFromDisk(const base::FilePath& path);
 
   // ComponentInstaller interface
@@ skipping 42 matching lines @@
   base::FilePath crl_path_;
 
   // We keep a pointer to the current CRLSet for use on the FILE thread when
   // applying delta updates.
   scoped_refptr<net::CRLSet> crl_set_;
 
   DISALLOW_COPY_AND_ASSIGN(CRLSetFetcher);
 };
 
 #endif  // CHROME_BROWSER_NET_CRL_SET_FETCHER_H_