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 13 matching lines @@
   // Enumeration of the possible columns in the certificate manager tree view.
   enum Column {
     COL_SUBJECT_NAME,
     COL_CERTIFICATE_STORE,
     COL_SERIAL_NUMBER,
     COL_EXPIRES_ON,
   };
 
   class Observer {
    public:
+    virtual ~Observer() { }
+
     // 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;
   };
 
   explicit CertificateManagerModel(Observer* observer);
   ~CertificateManagerModel();
 
   // Accessor for read-only access to the underlying NSSCertDatabase.
@@ skipping 70 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_