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

net/base/keygen_handler_win.cc

 // Copyright (c) 2011 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/keygen_handler.h"
 
 #include <windows.h>
-#include <wincrypt.h>
-#pragma comment(lib, "crypt32.lib")
 #include <rpc.h>
-#pragma comment(lib, "rpcrt4.lib")
 
 #include <list>
 #include <string>
 #include <vector>
 
 #include "base/base64.h"
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "crypto/capi_util.h"
 #include "crypto/scoped_capi_types.h"
+#include "crypto/wincrypt_shim.h"
 
+#pragma comment(lib, "crypt32.lib")
+#pragma comment(lib, "rpcrt4.lib")
 
 namespace net {
 
 // Assigns the contents of a CERT_PUBLIC_KEY_INFO structure for the signing
 // key in |prov| to |output|. Returns true if encoding was successful.
 bool GetSubjectPublicKeyInfo(HCRYPTPROV prov, std::vector<BYTE>* output) {
   BOOL ok;
   DWORD size = 0;
 
   // From the private key stored in HCRYPTPROV, obtain the public key, stored
@@ skipping 177 matching lines @@
 
     std::string result;
     base::Base64Encode(spkac, &result);
 
     VLOG(1) << "Keygen succeeded";
     return result;
   }
 }
 
 }  // namespace net