chrome: Add TabModalConfirmDialog interface.

chrome/browser/ui/tab_modal_confirm_dialog.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_TAB_MODAL_CONFIRM_DIALOG_H_
+#define CHROME_BROWSER_UI_TAB_MODAL_CONFIRM_DIALOG_H_
+
+class TabContents;
+class TabModalConfirmDialogDelegate;
+
+// Base class for the tab modal confirm dialog.
+class TabModalConfirmDialog {
+ public:
+  // Platform specific factory function. This function will automatically show
+  // the dialog.
+  static TabModalConfirmDialog* Create(TabModalConfirmDialogDelegate* delegate,
+                                       TabContents* tab_contents);
+  // Accepts the dialog.
+  virtual void AcceptTabModalDialog() = 0;
+
+  // Cancels the dialog.
+  virtual void CancelTabModalDialog() = 0;
+
+ protected:
+  virtual ~TabModalConfirmDialog() {}
+};
+
+#endif  // CHROME_BROWSER_UI_TAB_MODAL_CONFIRM_DIALOG_H_