Update keygen to use correct NSS slot on ChromeOS multiprofile.

chrome/browser/ui/views/crypto_module_password_dialog_view.cc

 // Copyright (c) 2012 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/ui/views/crypto_module_password_dialog_view.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/events/event.h"
@@ skipping 36 matching lines @@
   return l10n_util::GetStringUTF16(IDS_CRYPTO_MODULE_AUTH_DIALOG_TITLE);
 }
 
 string16 CryptoModulePasswordDialogView::GetDialogButtonLabel(
     ui::DialogButton button) const {
   return l10n_util::GetStringUTF16(button == ui::DIALOG_BUTTON_OK ?
       IDS_CRYPTO_MODULE_AUTH_DIALOG_OK_BUTTON_LABEL : IDS_CANCEL);
 }
 
 bool CryptoModulePasswordDialogView::Cancel() {
-  callback_.Run(static_cast<const char*>(NULL));
+  callback_.Run(std::string());
   const base::string16 empty;
   password_entry_->SetText(empty);
   return true;
 }
 
 bool CryptoModulePasswordDialogView::Accept() {
-  callback_.Run(UTF16ToUTF8(password_entry_->text()).c_str());
+  callback_.Run(UTF16ToUTF8(password_entry_->text()));
   const base::string16 empty;
   password_entry_->SetText(empty);
   return true;
 }
 
 void CryptoModulePasswordDialogView::ContentsChanged(
     views::Textfield* sender,
     const base::string16& new_contents) {
 }
 
@@ skipping 79 matching lines @@
     CryptoModulePasswordReason reason,
     const std::string& server,
     gfx::NativeWindow parent,
     const CryptoModulePasswordCallback& callback) {
   CryptoModulePasswordDialogView* dialog =
       new CryptoModulePasswordDialogView(slot_name, reason, server, callback);
   views::DialogDelegate::CreateDialogWidget(dialog, NULL, parent)->Show();
 }
 
 }  // namespace chrome