Mac: implement <keygen> support, including adding generated cert to the Keychain.

net/url_request/url_request.h

 // Copyright (c) 2006-2009 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_URL_REQUEST_URL_REQUEST_H_
 #define NET_URL_REQUEST_URL_REQUEST_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 169 matching lines @@
     // we were expecting for that host.  The delegate should either do the
     // safe thing and Cancel() the request or decide to proceed by calling
     // ContinueDespiteLastError().  cert_error is a net::ERR_* error code
     // indicating what's wrong with the certificate.
     virtual void OnSSLCertificateError(URLRequest* request,
                                        int cert_error,
                                        net::X509Certificate* cert) {
       request->Cancel();
     }
 
+    // Called when the server response body contains a client certificate to be
+    // stored locally. This happens in response to the posting of a form that
+    // contains a <keygen> element -- the server fills out the certificate
+    // request and returns the X.509 cert data.
+    virtual void OnClientCertificateGenerated(URLRequest* request,
+                                              net::X509Certificate* cert) {
+    }
+
     // Called when unable to get cookies due to policy.
     virtual void OnGetCookiesBlocked(URLRequest* request) {
     }
 
     // Called when unable to set a cookie due to policy.
     virtual void OnSetCookieBlocked(URLRequest* request) {
     }
 
     // After calling Start(), the delegate will receive an OnResponseStarted
     // callback when the request has completed.  If an error occurred, the
@@ skipping 431 matching lines @@
   // this to determine which URLRequest to allocate sockets to first.
   net::RequestPriority priority_;
 
   RequestTracker<URLRequest>::Node request_tracker_node_;
   base::LeakTracker<URLRequest> leak_tracker_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequest);
 };
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_H_