cros: Move LockWindow from chrome to ash

ash/login/ui/lock_window.h

Index: ash/login/ui/lock_window.h
diff --git a/chrome/browser/chromeos/login/ui/lock_window.h b/ash/login/ui/lock_window.h
similarity index 68%
rename from chrome/browser/chromeos/login/ui/lock_window.h
rename to ash/login/ui/lock_window.h
index 9cc43560ea5763737a4c7a9d2b109712e6b34e98..f0499a3f9433286bf21fd6c91b4809814cbcba5e 100644
--- a/chrome/browser/chromeos/login/ui/lock_window.h
+++ b/ash/login/ui/lock_window.h
@@ -2,9 +2,10 @@
 // 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_
+#ifndef ASH_LOGIN_UI_LOCK_WINDOW_H_
+#define ASH_LOGIN_UI_LOCK_WINDOW_H_
 
+#include "ash/ash_export.h"
 #include "base/macros.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_delegate.h"
@@ -14,10 +15,11 @@ class View;
 class Widget;
 }
 
-namespace chromeos {
+namespace ash {
 
 // Shows the widget for the lock screen.
-class LockWindow : public views::Widget, public views::WidgetDelegate {
+class ASH_EXPORT LockWindow : public views::Widget,
+                              public views::WidgetDelegate {
  public:
   LockWindow();
   ~LockWindow() override;
@@ -31,6 +33,6 @@ class LockWindow : public views::Widget, public views::WidgetDelegate {
   DISALLOW_COPY_AND_ASSIGN(LockWindow);
 };
 
-}  // namespace chromeos
+}  // namespace ash
 
-#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOCK_WINDOW_H_
+#endif  // ASH_LOGIN_UI_LOCK_WINDOW_H_