views: Add a new ctor to MessageBoxView that takes only a InitParams.

chrome/browser/ui/views/download/download_in_progress_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/download/download_in_progress_dialog_view.h"
 
 #include <algorithm>
 
 #include "base/string_number_conversions.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 57 matching lines @@
       break;
     default:
       // This dialog should have been created within the same thread invocation
       // as the original test that lead to us, so it should always not be ok
       // to close.
       NOTREACHED();
   }
   cancel_button_text_ = l10n_util::GetStringUTF16(
       IDS_DOWNLOAD_REMOVE_CONFIRM_CANCEL_BUTTON_LABEL);
 
-  message_box_view_ = new views::MessageBoxView(
-      views::MessageBoxView::NO_OPTIONS, explanation_text, string16());
+  message_box_view_ = new views::MessageBoxView(explanation_text);
 }
 
 DownloadInProgressDialogView::~DownloadInProgressDialogView() {}
 
 int DownloadInProgressDialogView::GetDefaultDialogButton() const {
   return ui::DIALOG_BUTTON_CANCEL;
 }
 
 string16 DownloadInProgressDialogView::GetDialogButtonLabel(
     ui::DialogButton button) const {
@@ skipping 27 matching lines @@
   return message_box_view_->GetWidget();
 }
 
 const views::Widget* DownloadInProgressDialogView::GetWidget() const {
   return message_box_view_->GetWidget();
 }
 
 views::View* DownloadInProgressDialogView::GetContentsView() {
   return message_box_view_;
 }