GTTF: Add missing virtual destructors.

chrome/browser/certificate_manager_model.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_CERTIFICATE_MANAGER_MODEL_H_
 #define CHROME_BROWSER_CERTIFICATE_MANAGER_MODEL_H_
 
 #include <map>
 #include <string>
 
@@ skipping 17 matching lines @@
     COL_SERIAL_NUMBER,
     COL_EXPIRES_ON,
   };
 
   class Observer {
    public:
     // Called to notify the view that the certificate list has been refreshed.
     // TODO(mattm): do a more granular updating strategy?  Maybe retrieve new
     // list of certs, diff against past list, and then notify of the changes?
     virtual void CertificatesRefreshed() = 0;
+
+   protected:
+    virtual ~Observer() { }
   };
 
   explicit CertificateManagerModel(Observer* observer);
   ~CertificateManagerModel();
 
   // Accessor for read-only access to the underlying NSSCertDatabase.
   const net::NSSCertDatabase* cert_db() const { return cert_db_; }
 
   // Trigger a refresh of the list of certs, unlock any slots if necessary.
   // Following this call, the observer CertificatesRefreshed method will be
@@ skipping 66 matching lines @@
   net::NSSCertDatabase* cert_db_;
   net::CertificateList cert_list_;
 
   // The observer to notify when certificate list is refreshed.
   Observer* observer_;
 
   DISALLOW_COPY_AND_ASSIGN(CertificateManagerModel);
 };
 
 #endif  // CHROME_BROWSER_CERTIFICATE_MANAGER_MODEL_H_