Gracefully handle NULL CertVerifiers in SSLClientSocket.

net/socket/ssl_client_socket_nss.cc

 // 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.
 
 // This file includes code SSLClientSocketNSS::DoVerifyCertComplete() derived
 // from AuthCertificateCallback() in
 // mozilla/security/manager/ssl/src/nsNSSCallbacks.cpp.
 
 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
@@ skipping 3073 matching lines @@
   }
 
   // We may have failed to create X509Certificate object if we are
   // running inside sandbox.
   if (!core_->state().server_cert.get()) {
     server_cert_verify_result_.Reset();
     server_cert_verify_result_.cert_status = CERT_STATUS_INVALID;
     return ERR_CERT_INVALID;
   }
 
+  if (!cert_verifier_) {
+    // Without a CertVerifier, all certificates are invalid.
+    server_cert_verify_result_.cert_status = CERT_STATUS_INVALID;
+    return ERR_CERT_INVALID;
+  }
+
   start_cert_verification_time_ = base::TimeTicks::Now();
 
   int flags = 0;
   if (ssl_config_.rev_checking_enabled)
     flags |= CertVerifier::VERIFY_REV_CHECKING_ENABLED;
   if (ssl_config_.verify_ev_cert)
     flags |= CertVerifier::VERIFY_EV_CERT;
   if (ssl_config_.cert_io_enabled)
     flags |= CertVerifier::VERIFY_CERT_IO_ENABLED;
   if (ssl_config_.rev_checking_required_local_anchors)
@@ skipping 134 matching lines @@
 scoped_refptr<X509Certificate>
 SSLClientSocketNSS::GetUnverifiedServerCertificateChain() const {
   return core_->state().server_cert.get();
 }
 
 ChannelIDService* SSLClientSocketNSS::GetChannelIDService() const {
   return channel_id_service_;
 }
 
 }  // namespace net