Add the "virtual" keyword on method overrides that are missing it.

net/url_request/https_prober.h

 // Copyright (c) 2010 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 NET_BASE_HTTPS_PROBER_H_
 #define NET_BASE_HTTPS_PROBER_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 35 matching lines @@
   // ProbeHost starts a new probe for the given host. If the host is known to
   // have been probed since the browser was started, false is returned and no
   // other action is taken. If a probe to the given host in currently inflight,
   // false will be returned, and no other action is taken. Otherwise, a new
   // probe is started, true is returned and the Delegate will be called with the
   // results (true means a successful handshake).
   bool ProbeHost(const std::string& host, URLRequestContext* ctx,
                  HTTPSProberDelegate* delegate);
 
   // Implementation of net::URLRequest::Delegate
-  void OnAuthRequired(net::URLRequest* request,
-                      net::AuthChallengeInfo* auth_info);
-  void OnSSLCertificateError(net::URLRequest* request,
-                             int cert_error,
-                             net::X509Certificate* cert);
-  void OnResponseStarted(net::URLRequest* request);
-  void OnReadCompleted(net::URLRequest* request, int bytes_read);
+  virtual void OnAuthRequired(net::URLRequest* request,
+                              net::AuthChallengeInfo* auth_info);
+  virtual void OnSSLCertificateError(net::URLRequest* request,
+                                     int cert_error,
+                                     net::X509Certificate* cert);
+  virtual void OnResponseStarted(net::URLRequest* request);
+  virtual void OnReadCompleted(net::URLRequest* request, int bytes_read);
 
  private:
   void Success(net::URLRequest* request);
   void Failure(net::URLRequest* request);
   void DoCallback(net::URLRequest* request, bool result);
 
   std::map<std::string, HTTPSProberDelegate*> inflight_probes_;
   std::set<std::string> probed_;
 
   friend struct DefaultSingletonTraits<HTTPSProber>;
   DISALLOW_COPY_AND_ASSIGN(HTTPSProber);
 };
 
 }  // namespace net
 #endif