Disable ephemeral apps after they stop running

chrome/browser/apps/ephemeral_app_service.h

 // Copyright 2013 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_APPS_EPHEMERAL_APP_SERVICE_H_
 #define CHROME_BROWSER_APPS_EPHEMERAL_APP_SERVICE_H_
 
 #include <map>
 #include <set>
 
+#include "apps/app_lifetime_monitor.h"
+#include "base/memory/weak_ptr.h"
 #include "base/scoped_observer.h"
 #include "base/timer/timer.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/extension_registry_observer.h"
 
 class Profile;
 
 namespace extensions {
 class Extension;
 class ExtensionRegistry;
 }  // namespace extensions
 
 // Performs the background garbage collection of ephemeral apps.
 class EphemeralAppService : public KeyedService,
                             public content::NotificationObserver,
-                            public extensions::ExtensionRegistryObserver {
+                            public extensions::ExtensionRegistryObserver,
+                            public apps::AppLifetimeMonitor::Observer {
  public:
   // Returns the instance for the given profile. This is a convenience wrapper
   // around EphemeralAppServiceFactory::GetForProfile.
   static EphemeralAppService* Get(Profile* profile);
 
   explicit EphemeralAppService(Profile* profile);
   virtual ~EphemeralAppService();
 
   int ephemeral_app_count() const { return ephemeral_app_count_; }
 
+  void set_unload_delay_for_test(int delay) { unload_idle_app_delay_ = delay; }
+
   // Constants exposed for testing purposes:
 
   // The number of days of inactivity before an ephemeral app will be removed.
   static const int kAppInactiveThreshold;
   // If the ephemeral app has been launched within this number of days, it will
   // definitely not be garbage collected.
   static const int kAppKeepThreshold;
   // The maximum number of ephemeral apps to keep cached. Excess may be removed.
   static const int kMaxEphemeralAppsCount;
 
@@ skipping 10 matching lines @@
   virtual void OnExtensionWillBeInstalled(
       content::BrowserContext* browser_context,
       const extensions::Extension* extension,
       bool is_update,
       bool from_ephemeral,
       const std::string& old_name) OVERRIDE;
   virtual void OnExtensionUninstalled(
       content::BrowserContext* browser_context,
       const extensions::Extension* extension) OVERRIDE;
 
+  // apps::AppLifetimeMonitor::Observer implementation.
+  virtual void OnAppStop(Profile* profile, const std::string& app_id) OVERRIDE;
+  virtual void OnChromeTerminating() OVERRIDE;
+
   void Init();
   void InitEphemeralAppCount();
 
+  void UnloadEphemeralApp(const std::string& app_id);
+  void UnloadEphemeralAppsOnStartup();
+
+  void HandleEphemeralAppPromoted(const extensions::Extension* app);
+
   // Garbage collect ephemeral apps.
   void TriggerGarbageCollect(const base::TimeDelta& delay);
   void GarbageCollectApps();
   static void GetAppsToRemove(int app_count,
                               const LaunchTimeAppMap& app_launch_times,
                               std::set<std::string>* remove_app_ids);
 
   Profile* profile_;
 
   content::NotificationRegistrar registrar_;
   ScopedObserver<extensions::ExtensionRegistry,
                  extensions::ExtensionRegistryObserver>
       extension_registry_observer_;
 
   base::OneShotTimer<EphemeralAppService> garbage_collect_apps_timer_;
 
   // The count of cached ephemeral apps.
   int ephemeral_app_count_;
 
+  // Number of seconds before unloading idle ephemeral apps.
+  // Overridden in tests.
+  int unload_idle_app_delay_;
+
+  base::WeakPtrFactory<EphemeralAppService> weak_ptr_factory_;
+
   friend class EphemeralAppServiceTest;
   friend class EphemeralAppServiceBrowserTest;
 
   DISALLOW_COPY_AND_ASSIGN(EphemeralAppService);
 };
 
 #endif  // CHROME_BROWSER_APPS_EPHEMERAL_APP_SERVICE_H_