Enable WebUI ScreenLocker for aura by abstracting lock window.

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_
+#pragma once
+
+class DOMView;
+
+namespace views {
+class View;
+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();
+
+  // Sets |content| as the contents view for the lock window.
+  virtual void SetContentsView(views::View* content) = 0;
+
+  // Shows the lock window, |dom_view| is the actual view displaying the lock
+  // screen DOM for which inputs may be grabbed.
+  virtual void Show(DOMView* dom_view) = 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_;

[oshima, 2011/11/30 23:41:07]

DISALLOW_COPY_AND_ASSIGN

[flackr, 2011/12/01 21:40:40]

All of the interface/virtual classes I looked at do not have this. Also:
./chrome/browser/chromeos/login/lock_window.h:56: error: ISO C++ forbids
declaration of 'DISALLOW_COPY_AND_ASSIGN' with no type
./chrome/browser/chromeos/login/lock_window.h:56: error: cannot declare
parameter '<anonymous>' to be of abstract type 'chromeos::LockWindow'
./chrome/browser/chromeos/login/lock_window.h:20: note:   because the following
virtual functions are pure within 'chromeos::LockWindow':

[oshima, 2011/12/01 22:45:35]

This is not interface class because it has instance variable.

 Also:
you need "base/basictypes.h"

[flackr, 2011/12/01 23:16:34]

Thanks, sorry for the confusion! Done.

+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_LOCK_WINDOW_H_