cros: Initial structure for views-based lock.

chrome/browser/chromeos/login/ui/lock_window.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 CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOCK_WINDOW_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOCK_WINDOW_H_
 
 #include "base/macros.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_delegate.h"
 
 namespace views {
 class View;
 class Widget;
 }
 
 namespace chromeos {
 
-// Shows the widget for the WebUI screen locker.
+// Shows the widget for the lock screen.
 class LockWindow : public views::Widget, public views::WidgetDelegate {
  public:
-  explicit LockWindow(views::View* initially_focused_view);
+  LockWindow();
   ~LockWindow() override;
 
  private:
   // views::WidgetDelegate:
   views::View* GetInitiallyFocusedView() override;
   views::Widget* GetWidget() override;
   const views::Widget* GetWidget() const override;
 
-  // The view which should be initially focused.
-  views::View* initially_focused_view_ = nullptr;
-
   DISALLOW_COPY_AND_ASSIGN(LockWindow);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOCK_WINDOW_H_