Remove Windows Vista/XP specific code from net/cert and net/ssl.

net/ssl/ssl_platform_key_win.cc

 // Copyright 2015 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/ssl_platform_key.h"
 
 #include <windows.h>
 #include <NCrypt.h>
 
 #include <algorithm>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include <openssl/bn.h>
 #include <openssl/ecdsa.h>
 #include <openssl/evp.h>
 #include <openssl/x509.h>
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/sequenced_task_runner.h"
-#include "base/win/windows_version.h"
 #include "crypto/openssl_util.h"
 #include "crypto/scoped_capi_types.h"
 #include "crypto/wincrypt_shim.h"
 #include "net/base/net_errors.h"
 #include "net/cert/x509_certificate.h"
 #include "net/ssl/scoped_openssl_types.h"
 #include "net/ssl/ssl_platform_key_task_runner.h"
 #include "net/ssl/ssl_private_key.h"
 #include "net/ssl/threaded_ssl_private_key.h"
 
@@ skipping 295 matching lines @@
   SSLPrivateKey::Type key_type;
   size_t max_length;
   if (!GetKeyInfo(certificate, &key_type, &max_length))
     return nullptr;
 
   PCCERT_CONTEXT cert_context = certificate->os_cert_handle();
 
   HCRYPTPROV_OR_NCRYPT_KEY_HANDLE prov_or_key = 0;
   DWORD key_spec = 0;
   BOOL must_free = FALSE;
-  DWORD flags = 0;
-  if (base::win::GetVersion() >= base::win::VERSION_VISTA)
-    flags |= CRYPT_ACQUIRE_PREFER_NCRYPT_KEY_FLAG;
+  DWORD flags = CRYPT_ACQUIRE_PREFER_NCRYPT_KEY_FLAG;
 
   if (!CryptAcquireCertificatePrivateKey(cert_context, flags, nullptr,
                                          &prov_or_key, &key_spec, &must_free)) {
     PLOG(WARNING) << "Could not acquire private key";
     return nullptr;
   }
 
   // Should never get a cached handle back - ownership must always be
   // transferred.
   CHECK_EQ(must_free, TRUE);
 
   std::unique_ptr<ThreadedSSLPrivateKey::Delegate> delegate;
   if (key_spec == CERT_NCRYPT_KEY_SPEC) {
     delegate.reset(new SSLPlatformKeyCNG(prov_or_key, key_type, max_length));
   } else {
     DCHECK(SSLPrivateKey::Type::RSA == key_type);
     delegate.reset(new SSLPlatformKeyCAPI(prov_or_key, key_spec, max_length));
   }
   return make_scoped_refptr(new ThreadedSSLPrivateKey(
       std::move(delegate), GetSSLPlatformKeyTaskRunner()));
 }
 
 }  // namespace net