Add crypto/wincrypt_shim.h wrapper header to resolve BoringSSL conflicts.

net/ssl/client_cert_store_win.cc

 // Copyright 2013 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/ssl/client_cert_store_win.h"
 
 #include <algorithm>
 #include <string>
 
 #define SECURITY_WIN32  // Needs to be defined before including security.h
 #include <windows.h>
-#include <wincrypt.h>
 #include <security.h>
 
 #include "base/callback.h"
 #include "base/logging.h"
 #include "crypto/scoped_capi_types.h"
+#include "crypto/wincrypt.h"
 #include "net/cert/x509_util.h"
 
 namespace net {
 
 namespace {
 
 // Callback required by Windows API function CertFindChainInStore(). In addition
 // to filtering by extended/enhanced key usage, we do not show expired
 // certificates and require digital signature usage in the key usage extension.
 //
@@ skipping 173 matching lines @@
     // copy).
     if (!CertFreeCertificateContext(cert))
       return false;
   }
 
   GetClientCertsImpl(test_store.get(), request, selected_certs);
   return true;
 }
 
 }  // namespace net