Create stubs for system certificate validation.

net/base/cert_verify_proc_nss.cc

Index: net/base/cert_verify_proc_nss.cc
diff --git a/net/base/cert_verify_proc_nss.cc b/net/base/cert_verify_proc_nss.cc
new file mode 100644
index 0000000000000000000000000000000000000000..117aa61acb89fca6587cc9c43cfbc06494d29d3e
--- /dev/null
+++ b/net/base/cert_verify_proc_nss.cc
@@ -0,0 +1,23 @@
+// 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.
+
+#include "net/base/cert_verify_proc_nss.h"
+
+#include "net/base/x509_certificate.h"
+
+namespace net {
+
+CertVerifyProcNSS::CertVerifyProcNSS() {}
+
+int CertVerifyProcNSS::Verify(X509Certificate* cert,
+                              const std::string& hostname,
+                              int flags,
+                              CRLSet* crl_set,
+                              CertVerifyResult* verify_result) {
+  return cert->Verify(hostname, flags, crl_set, verify_result);
+}
+
+CertVerifyProcNSS::~CertVerifyProcNSS() {}
+
+}  // namespace net