[Win] Add option to reauthenticate the OS user before revealing passwords.

chrome/browser/password_manager/password_manager_util_mac.mm

 // 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 "chrome/browser/password_manager/password_manager_util.h"
 
 #import <Foundation/Foundation.h>
 #include <CoreFoundation/CoreFoundation.h>
 #include <Security/Authorization.h>
 
 #include "base/basictypes.h"
 #include "base/mac/authorization_util.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_authorizationref.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 namespace password_manager_util {
 
-bool AuthenticateUser() {
+bool AuthenticateUser(gfx::NativeWindow window) {
   AuthorizationItem right_items[] = {
     {"com.google.Chrome.show-passwords", 0, NULL, 0}
   };
   AuthorizationRights rights = {arraysize(right_items), right_items};
 
   NSString* prompt =
       l10n_util::GetNSString(IDS_PASSWORDS_PAGE_AUTHENTICATION_PROMPT);
 
   // Pass kAuthorizationFlagDestroyRights to prevent the OS from saving the
   // authorization and not prompting the user when future requests are made.
   base::mac::ScopedAuthorizationRef authorization(
       base::mac::GetAuthorizationRightsWithPrompt(
           &rights, base::mac::NSToCFCast(prompt),
           kAuthorizationFlagDestroyRights));
   return authorization.get() != NULL;
 }
 
 }  // namespace password_manager_util