chrome: Add TabModalConfirmDialog interface.

chrome/browser/ui/browser_dialogs.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_BROWSER_DIALOGS_H_
 #define CHROME_BROWSER_UI_BROWSER_DIALOGS_H_
 
 #include "ipc/ipc_message.h"  // For IPC_MESSAGE_LOG_ENABLED.
 #include "ui/gfx/native_widget_types.h"
 
@@ skipping 46 matching lines @@
 void ShowExtensionInstalledBubble(const extensions::Extension* extension,
                                   Browser* browser,
                                   const SkBitmap& icon);
 
 // Shows or hide the hung renderer dialog for the given WebContents.
 // We need to pass the WebContents to the dialog, because multiple tabs can hang
 // and it needs to keep track of which tabs are currently hung.
 void ShowHungRendererDialog(content::WebContents* contents);
 void HideHungRendererDialog(content::WebContents* contents);
 
-// Shows a tab-modal dialog box.
-void ShowTabModalConfirmDialog(TabModalConfirmDialogDelegate* delegate,
-                               TabContents* tab_contents);
-
 #if !defined(OS_MACOSX)
 // Shows the create web app shortcut dialog box.
 void ShowCreateWebAppShortcutsDialog(gfx::NativeWindow parent_window,
                                      TabContents* tab_contents);
 #endif
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_BROWSER_DIALOGS_H_