GTTF: Add missing virtual destructors.

chrome/browser/policy/user_info_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_POLICY_USER_INFO_FETCHER_H_
 #define CHROME_BROWSER_POLICY_USER_INFO_FETCHER_H_
 
 #include <string>
 #include "base/memory/scoped_ptr.h"
 #include "net/url_request/url_fetcher_delegate.h"
@@ skipping 20 matching lines @@
     // Invoked when the UserInfo request has succeeded, passing the parsed
     // response in |response|. Delegate may free the UserInfoFetcher in this
     // callback.
     virtual void OnGetUserInfoSuccess(
         const base::DictionaryValue* response) = 0;
 
     // Invoked when the UserInfo request has failed, passing the associated
     // error in |error|. Delegate may free the UserInfoFetcher in this
     // callback.
     virtual void OnGetUserInfoFailure(const GoogleServiceAuthError& error) = 0;
+
+   protected:
+    virtual ~Delegate() { }
   };
 
   // Create a new UserInfoFetcher. |context| can be NULL for unit tests.
   UserInfoFetcher(Delegate* delegate, net::URLRequestContextGetter* context);
   virtual ~UserInfoFetcher();
 
   // Starts the UserInfo request, using the passed OAuth2 |access_token|.
   void Start(const std::string& access_token);
 
   // net::URLFetcherDelegate implementation.
   virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
 
  private:
   Delegate* delegate_;
   net::URLRequestContextGetter* context_;
   scoped_ptr<net::URLFetcher> url_fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(UserInfoFetcher);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_USER_INFO_FETCHER_H_