Factor out uses of the WebContentsModalDialog interface from platform-independent code

chrome/browser/ui/views/tab_modal_confirm_dialog_views.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/tab_modal_confirm_dialog_views.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window.h"
@@ skipping 14 matching lines @@
 }
 
 //////////////////////////////////////////////////////////////////////////////
 // TabModalConfirmDialogViews, constructor & destructor:
 
 TabModalConfirmDialogViews::TabModalConfirmDialogViews(
     TabModalConfirmDialogDelegate* delegate,
     content::WebContents* web_contents)
     : delegate_(delegate),
       message_box_view_(new views::MessageBoxView(
-          views::MessageBoxView::InitParams(delegate->GetMessage()))) {
-  delegate_->set_window(ConstrainedWindowViews::Create(web_contents, this));
+          views::MessageBoxView::InitParams(delegate->GetMessage()))),
+      dialog_(NULL) {
+  dialog_ = ConstrainedWindowViews::Create(web_contents, this);
+  delegate_->set_close_delegate(this);
 }
 
 TabModalConfirmDialogViews::~TabModalConfirmDialogViews() {
 }
 
 void TabModalConfirmDialogViews::AcceptTabModalDialog() {
   GetDialogClientView()->AcceptWindow();
 }
 
 void TabModalConfirmDialogViews::CancelTabModalDialog() {
   GetDialogClientView()->CancelWindow();
 }
 
+void TabModalConfirmDialogViews::CloseDialog() {
+  dialog_->CloseWebContentsModalDialog();
+}
+
 //////////////////////////////////////////////////////////////////////////////
 // TabModalConfirmDialogViews, views::DialogDelegate implementation:
 
 string16 TabModalConfirmDialogViews::GetWindowTitle() const {
   return delegate_->GetTitle();
 }
 
 string16 TabModalConfirmDialogViews::GetDialogButtonLabel(
     ui::DialogButton button) const {
   if (button == ui::DIALOG_BUTTON_OK)
@@ skipping 32 matching lines @@
   delete this;
 }
 
 ui::ModalType TabModalConfirmDialogViews::GetModalType() const {
 #if defined(USE_ASH)
   return ui::MODAL_TYPE_CHILD;
 #else
   return views::WidgetDelegate::GetModalType();
 #endif
 }