Delete athena/

athena/activity/public/activity_manager.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 ATHENA_ACTIVITY_PUBLIC_ACTIVITY_MANAGER_H_
-#define ATHENA_ACTIVITY_PUBLIC_ACTIVITY_MANAGER_H_
-
-#include <vector>
-
-#include "athena/athena_export.h"
-
-namespace aura {
-class Window;
-}
-
-namespace athena {
-
-class Activity;
-class ActivityManagerObserver;
-
-using ActivityList = std::vector<Activity*>;
-
-// Manages a set of activities.
-class ATHENA_EXPORT ActivityManager {
- public:
-  static ActivityManager* Create();
-  static ActivityManager* Get();
-  static void Shutdown();
-
-  virtual ~ActivityManager() {}
-
-  // Adds/Removes an activity. ActivityManager owns the activities.
-  virtual void AddActivity(Activity* activity) = 0;
-  virtual void RemoveActivity(Activity* activity) = 0;
-
-  // Returns a list of activities, sorted in their activation order (the most
-  // recently used activity is at the front of the returned list).
-  virtual const ActivityList& GetActivityList() = 0;
-
-  // Returns the activity that has a |window| as toplevel window, or
-  // nullptr if such activity does not exist.
-  virtual Activity* GetActivityForWindow(aura::Window* window) = 0;
-
-  virtual void AddObserver(ActivityManagerObserver* observer) = 0;
-  virtual void RemoveObserver(ActivityManagerObserver* observer) = 0;
-};
-
-}  // namespace athena
-
-#endif  // ATHENA_ACTIVITY_PUBLIC_ACTIVITY_MANAGER_H_