Separate athena's startup process from AppShell's

extensions/shell/browser/default_shell_app_window_controller.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 EXTENSIONS_SHELL_BROWSER_DEFAULT_SHELL_APP_WINDOW_CONTROLLER_H_
-#define EXTENSIONS_SHELL_BROWSER_DEFAULT_SHELL_APP_WINDOW_CONTROLLER_H_
-
-#include "extensions/shell/browser/shell_app_window_controller.h"
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-
-namespace extensions {
-
-class ShellDesktopController;
-
-// The default shell app window controller for app_shell.  It manages only one
-// app_window.
-class DefaultShellAppWindowController : public ShellAppWindowController {
- public:
-  explicit DefaultShellAppWindowController(
-      ShellDesktopController* shell_desktop_controller);
-  virtual ~DefaultShellAppWindowController();
-
-  // ShellAppWindowController implementation.
-  virtual ShellAppWindow* CreateAppWindow(
-      content::BrowserContext* context) OVERRIDE;
-  virtual void CloseAppWindows() OVERRIDE;
-
- private:
-  ShellDesktopController* shell_desktop_controller_;  // Not owned
-
-  // The desktop supports a single app window.
-  scoped_ptr<ShellAppWindow> app_window_;
-
-  DISALLOW_COPY_AND_ASSIGN(DefaultShellAppWindowController);
-};
-
-}  // namespace extensions
-
-#endif  // EXTENSIONS_SHELL_BROWSER_DEFAULT_SHELL_APP_WINDOW_CONTROLLER_H_