Revert 291221 "Athena: Adding basic resource management framewor..."

trunk/src/athena/content/app_activity_registry.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_CONTENT_APP_ACTIVITY_REGISTRY_H_
-#define ATHENA_CONTENT_APP_ACTIVITY_REGISTRY_H_
-
-#include <vector>
-
-#include "athena/activity/public/activity_view_model.h"
-#include "athena/content/app_activity_proxy.h"
-
-namespace aura {
-class Window;
-}
-
-namespace content {
-class BrowserContext;
-}
-
-namespace athena {
-
-class AppActivity;
-
-// This class keeps track of all existing |AppActivity|s and shuts down all of
-// them when the application gets unloaded to save memory. It will then replace
-// the |AppActivity| in the Activity list as proxy to allow restarting of the
-// application.
-class ATHENA_EXPORT AppActivityRegistry {
- public:
-  AppActivityRegistry(const std::string& app_id,
-                      content::BrowserContext* browser_context);
-  virtual ~AppActivityRegistry();
-
-  // Register an |AppActivity| with this application.
-  void RegisterAppActivity(AppActivity* app_activity);
-
-  // Unregister a previously attached |AppActivity|.
-  // Note that detaching the last |AppActivity| will delete this object - unless
-  // the resource manager was trying to unload the application.
-  // Note furthermore that Detach can be called without ever being registered.
-  void UnregisterAppActivity(AppActivity* app_activity);
-
-  // Returns the number of activities/windows with this application.
-  int NumberOfActivities() const { return activity_list_.size(); }
-
-  // Returns the |AppActivity| at |index|. It will return NULL if an invalid
-  // index was specified.
-  AppActivity* GetAppActivityAt(size_t index);
-
-  // Unload all application associated activities to save resources.
-  void Unload();
-
-  // Returns true if the application is in the unloaded state.
-  bool IsUnloaded() { return unloaded_activity_proxy_ != NULL; }
-
-  content::BrowserContext* browser_context() const { return browser_context_; }
-  const std::string& app_id() const { return app_id_; }
-
-  AppActivityProxy* unloaded_activity_proxy_for_test() {
-    return unloaded_activity_proxy_;
-  }
-
- protected:
-  friend AppActivityProxy;
-
-  // When the |AppActivityProxy| gets destroyed it should call this function
-  // to disconnect from this object. This call might destroy |this|.
-  void ProxyDestroyed(AppActivityProxy* proxy);
-
-  // When called by the |AppActivityProxy| to restart the application, it can
-  // cause the application to restart. When that happens the proxy will get
-  // destroyed. After this call |this| might be destroyed.
-  void RestartApplication(AppActivityProxy* proxy);
-
- private:
-  // Move the window before the most recently used application window.
-  void MoveBeforeMruApplicationWindow(aura::Window* window);
-
-  // A list of all activities associated with this application.
-  std::vector<AppActivity*> activity_list_;
-
-  // The application id for this proxy.
-  std::string app_id_;
-
-  // The browser context of the user.
-  content::BrowserContext* browser_context_;
-
-  // When the activity is unloaded this is the AppActivityProxy. The object is
-  // owned the the ActivityManager.
-  AppActivityProxy* unloaded_activity_proxy_;
-
-  // The presentation values.
-  SkColor color_;
-  base::string16 title_;
-  gfx::ImageSkia image_;
-
-  DISALLOW_COPY_AND_ASSIGN(AppActivityRegistry);
-};
-
-}  // namespace athena
-
-#endif  // ATHENA_CONTENT_APP_ACTIVITY_REGISTRY_H_