GTTF: Add missing virtual destructors.

chrome/browser/metrics/variations/resource_request_allowed_notifier.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_METRICS_VARIATIONS_RESOURCE_REQUEST_ALLOWED_NOTIFIER_H_
 #define CHROME_BROWSER_METRICS_VARIATIONS_RESOURCE_REQUEST_ALLOWED_NOTIFIER_H_
 
 #include "base/observer_list.h"
 #include "net/base/network_change_notifier.h"
 
@@ skipping 23 matching lines @@
 // global instance.
 class ResourceRequestAllowedNotifier :
 #if defined(OS_CHROMEOS)
     public content::NotificationObserver,
 #endif
     public net::NetworkChangeNotifier::ConnectionTypeObserver {
  public:
   // Observes resource request allowed state changes.
   class Observer {
    public:
+    virtual ~Observer() { }
+
     virtual void OnResourceRequestsAllowed() = 0;
   };
 
   ResourceRequestAllowedNotifier();
   virtual ~ResourceRequestAllowedNotifier();
 
   // Sets |observer| as the service to be notified by this instance, and
   // performs initial checks on the criteria. |observer| may not be NULL.
   // This is to be called immediately after construction of an instance of
   // ResourceRequestAllowedNotifier to pass it the interested service.
@@ skipping 54 matching lines @@
   content::NotificationRegistrar registrar_;
 #endif
 
   // Observing service interested in request permissions.
   Observer* observer_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceRequestAllowedNotifier);
 };
 
 #endif  // CHROME_BROWSER_METRICS_VARIATIONS_RESOURCE_REQUEST_ALLOWED_NOTIFIER_H_