Make a clean interface for dialog callbacks.

chrome/browser/extensions/extension_host.h

 // Copyright (c) 2011 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_EXTENSIONS_EXTENSION_HOST_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_HOST_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 174 matching lines @@
   // NotificationObserver
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
   // Overridden from content::JavaScriptDialogDelegate:
   virtual void OnDialogClosed(IPC::Message* reply_msg,
                               bool success,
                               const string16& user_input) OVERRIDE;
   virtual gfx::NativeWindow GetDialogRootWindow() OVERRIDE;
-  virtual TabContents* AsTabContents() OVERRIDE;
-  virtual ExtensionHost* AsExtensionHost() OVERRIDE;
 
  protected:
   // Internal functions used to support the CreateNewWidget() method. If a
   // platform requires plugging into widget creation at a lower level, then a
   // subclass might want to override these functions, but otherwise they should
   // be fine just implementing RenderWidgetHostView::InitAsPopup().
   //
   // The Create function returns the newly created widget so it can be
   // associated with the given route. When the widget needs to be shown later,
   // we'll look it up again and pass the object to the Show functions rather
@@ skipping 80 matching lines @@
   // Used to measure how long it's been since the host was created.
   PerfTimer since_created_;
 
   // FileSelectHelper, lazily created.
   scoped_ptr<FileSelectHelper> file_select_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionHost);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_HOST_H_