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

chrome/browser/ui/views/tab_modal_confirm_dialog_views.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_TAB_MODAL_CONFIRM_DIALOG_VIEWS_H_
 #define CHROME_BROWSER_UI_VIEWS_TAB_MODAL_CONFIRM_DIALOG_VIEWS_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "chrome/browser/ui/tab_modal_confirm_dialog.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/views/window/dialog_delegate.h"
 
+class ConstrainedWindowViews;
+
 namespace content {
 class WebContents;
 }
 
 namespace views {
 class MessageBoxView;
 }
 
 // Displays a tab-modal dialog, i.e. a dialog that will block the current page
 // but still allow the user to switch to a different page.
@@ skipping 19 matching lines @@
   virtual void DeleteDelegate() OVERRIDE;
   virtual ui::ModalType GetModalType() const OVERRIDE;
 
  private:
   virtual ~TabModalConfirmDialogViews();
 
   // TabModalConfirmDialog:
   virtual void AcceptTabModalDialog() OVERRIDE;
   virtual void CancelTabModalDialog() OVERRIDE;
 
+  // TabModalConfirmDialogCloseDelegate:
+  virtual void CloseDialog() OVERRIDE;
+
   scoped_ptr<TabModalConfirmDialogDelegate> delegate_;
 
   // The message box view whose commands we handle.
   views::MessageBoxView* message_box_view_;
 
+  ConstrainedWindowViews* dialog_;
+
   DISALLOW_COPY_AND_ASSIGN(TabModalConfirmDialogViews);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TAB_MODAL_CONFIRM_DIALOG_VIEWS_H_