Drive extension functions from ExtensionFunction::Run. The

apps/shell/browser/shell_app_window_api.h

 // Copyright 2014 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 APPS_SHELL_BROWSER_SHELL_APP_WINDOW_API_H_
 #define APPS_SHELL_BROWSER_SHELL_APP_WINDOW_API_H_
 
 #include "base/compiler_specific.h"
 #include "extensions/browser/extension_function.h"
 
 namespace extensions {
 
 // A simplified implementation of the chrome.app.window.create() function for
 // app_shell. Opens a fullscreen window and invokes the window callback. Most
 // of the response is stub data, but the JS contentWindow is valid.
-class ShellAppWindowCreateFunction : public UIThreadExtensionFunction {
+class ShellAppWindowCreateFunction : public AsyncExtensionFunction {
  public:
   ShellAppWindowCreateFunction();
 
   // Don't use the APP_WINDOW_CREATE histogram so we don't pollute the
   // statistics for the real Chrome implementation.
   DECLARE_EXTENSION_FUNCTION("app.window.create", UNKNOWN);
 
  private:
   virtual ~ShellAppWindowCreateFunction();
-  virtual bool RunImpl() OVERRIDE;
+  virtual bool RunAsync() OVERRIDE;
 };
 
 }  // namespace extensions
 
 #endif  // APPS_SHELL_BROWSER_SHELL_APP_WINDOW_API_H_