[cros login] Split login related classes into subfolders.

chrome/browser/chromeos/login/lock_window.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_CHROMEOS_LOGIN_LOCK_WINDOW_H_
-#define CHROME_BROWSER_CHROMEOS_LOGIN_LOCK_WINDOW_H_
-
-#include "base/basictypes.h"
-
-namespace views {
-class Widget;
-}
-
-namespace chromeos {
-
-// This is the interface which lock windows used for the WebUI screen locker
-// implement.
-class LockWindow {
- public:
-  // This class provides an interface for the lock window to notify an observer
-  // about its status.
-  class Observer {
-   public:
-    // This method will be called when the lock window has finished all
-    // initialization.
-    virtual void OnLockWindowReady() = 0;
-  };
-
-  LockWindow();
-
-  // Attempt to grab inputs on the webview, the actual view displaying the lock
-  // screen WebView.
-  virtual void Grab() = 0;
-
-  // Returns the actual widget for the lock window.
-  virtual views::Widget* GetWidget() = 0;
-
-  // Sets the observer class which is notified on lock window events.
-  void set_observer(Observer* observer) {
-    observer_ = observer;
-  }
-
-  // Creates an instance of the platform specific lock window.
-  static LockWindow* Create();
-
- protected:
-  // The observer's OnLockWindowReady method will be called when the lock
-  // window has finished all initialization.
-  Observer* observer_;
-
-  DISALLOW_COPY_AND_ASSIGN(LockWindow);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_LOCK_WINDOW_H_