cros: Initial structure for views-based lock.

chrome/browser/chromeos/login/ui/lock_window.h

Index: chrome/browser/chromeos/login/ui/lock_window.h
diff --git a/chrome/browser/chromeos/login/ui/lock_window.h b/chrome/browser/chromeos/login/ui/lock_window.h
index bbc2d79da8a2cc8fc18fffce024b75c26e7d012a..9cc43560ea5763737a4c7a9d2b109712e6b34e98 100644
--- a/chrome/browser/chromeos/login/ui/lock_window.h
+++ b/chrome/browser/chromeos/login/ui/lock_window.h
@@ -16,10 +16,10 @@ 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:
@@ -28,9 +28,6 @@ class LockWindow : public views::Widget, public views::WidgetDelegate {
   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);
 };