Add a "device disabled" OOBE screen

chrome/browser/chromeos/login/screens/device_disabled_screen_actor.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_SCREENS_DEVICE_DISABLED_SCREEN_ACTOR_H_
+#define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_DEVICE_DISABLED_SCREEN_ACTOR_H_
+
+namespace chromeos {
+
+// Interface between the device disabled screen and its representation.
+class DeviceDisabledScreenActor {
+ public:
+  // Allows the representation to access information about the screen.
+  class Delegate {
+   public:
+    virtual ~Delegate() {
+    }
+
+    // Called when the actor is being destroyed. Note that if the Delegate is
+    // destroyed first, it must call SetDelegate(nullptr).
+    virtual void OnActorDestroyed(DeviceDisabledScreenActor* actor) = 0;
+  };
+
+  virtual ~DeviceDisabledScreenActor() {
+  }
+
+  virtual void Show() = 0;
+  virtual void Hide() = 0;
+  virtual void SetDelegate(Delegate* delegate) = 0;
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_DEVICE_DISABLED_SCREEN_ACTOR_H_
+