Shuffles around immersive related classes

ash/wm/immersive_handler_factory.h

-// Copyright 2016 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 ASH_WM_IMMERSIVE_HANDLER_FACTORY_H_
-#define ASH_WM_IMMERSIVE_HANDLER_FACTORY_H_
-
-#include <memory>
-
-#include "ash/ash_export.h"
-
-namespace ash {
-
-class ImmersiveFocusWatcher;
-class ImmersiveFullscreenController;
-class ImmersiveGestureHandler;
-
-// Used by ImmersiveFullscreenController to create event handlers/watchers.
-class ASH_EXPORT ImmersiveHandlerFactory {
- public:
-  static ImmersiveHandlerFactory* Get() { return instance_; }
-
-  virtual std::unique_ptr<ImmersiveFocusWatcher> CreateFocusWatcher(
-      ImmersiveFullscreenController* controller) = 0;
-
-  virtual std::unique_ptr<ImmersiveGestureHandler> CreateGestureHandler(
-      ImmersiveFullscreenController* controller) = 0;
-
- protected:
-  ImmersiveHandlerFactory();
-  virtual ~ImmersiveHandlerFactory();
-
- private:
-  static ImmersiveHandlerFactory* instance_;
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_IMMERSIVE_HANDLER_FACTORY_H_