When using SSLClientSocketNSS on Windows, fall back on SSLClientSocketWin...

net/socket/ssl_client_socket_win.cc

 // 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.
 
 #include "net/socket/ssl_client_socket_win.h"
 
 #include <schnlsp.h>
 
 #include "base/compiler_specific.h"
 #include "base/lock.h"
@@ skipping 352 matching lines @@
   SECURITY_STATUS status = QueryContextAttributes(
       &ctxt_, SECPKG_ATTR_ISSUER_LIST_EX, &issuer_list);
   if (status != SEC_E_OK) {
     DLOG(ERROR) << "QueryContextAttributes (issuer list) failed: " << status;
     return;
   }
 
   // Client certificates of the user are in the "MY" system certificate store.
   HCERTSTORE my_cert_store = CertOpenSystemStore(NULL, L"MY");
   if (!my_cert_store) {
+    LOG(ERROR) << "Could not open the \"MY\" system certificate store: "
+               << GetLastError();
     FreeContextBuffer(issuer_list.aIssuers);
     return;
   }
 
   // Enumerate the client certificates.
   CERT_CHAIN_FIND_BY_ISSUER_PARA find_by_issuer_para;
   memset(&find_by_issuer_para, 0, sizeof(find_by_issuer_para));
   find_by_issuer_para.cbSize = sizeof(find_by_issuer_para);
   find_by_issuer_para.pszUsageIdentifier = szOID_PKIX_KP_CLIENT_AUTH;
   find_by_issuer_para.cIssuer = issuer_list.cIssuers;
@@ skipping 953 matching lines @@
     UpdateConnectionTypeHistograms(CONNECTION_SSL_MD2_CA);
 }
 
 void SSLClientSocketWin::FreeSendBuffer() {
   SECURITY_STATUS status = FreeContextBuffer(send_buffer_.pvBuffer);
   DCHECK(status == SEC_E_OK);
   memset(&send_buffer_, 0, sizeof(send_buffer_));
 }
 
 }  // namespace net