Leave apps running on Windows and Linux when quitting Chrome from the wrench menu.

chrome/browser/background/background_mode_manager.h

 // Copyright (c) 2012 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_BACKGROUND_BACKGROUND_MODE_MANAGER_H_
 #define CHROME_BROWSER_BACKGROUND_BACKGROUND_MODE_MANAGER_H_
 
 #include <map>
 
 #include "base/gtest_prod_util.h"
 #include "base/prefs/pref_change_registrar.h"
 #include "chrome/browser/background/background_application_list_model.h"
 #include "chrome/browser/profiles/profile_info_cache_observer.h"
 #include "chrome/browser/status_icons/status_icon.h"
 #include "chrome/browser/status_icons/status_icon_menu_model.h"
+#include "chrome/browser/ui/browser_list_observer.h"
 #include "components/browser_context_keyed_service/browser_context_keyed_service.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 class Browser;
 class CommandLine;
 class PrefRegistrySimple;
 class Profile;
 class ProfileInfoCache;
 class StatusIcon;
@@ skipping 12 matching lines @@
 // installed/loaded extensions to ensure that Chrome enters/exits background
 // mode at the appropriate time.
 //
 // When Chrome is in background mode, it will continue running even after the
 // last browser window is closed, until the user explicitly exits the app.
 // Additionally, when in background mode, Chrome will launch on OS login with
 // no open windows to allow apps with the "background" permission to run in the
 // background.
 class BackgroundModeManager
     : public content::NotificationObserver,
+      public chrome::BrowserListObserver,
       public BackgroundApplicationListModel::Observer,
       public ProfileInfoCacheObserver,
       public StatusIconMenuModel::Delegate {
  public:
   BackgroundModeManager(CommandLine* command_line,
                         ProfileInfoCache* profile_cache);
   virtual ~BackgroundModeManager();
 
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
   virtual void RegisterProfile(Profile* profile);
 
   static void LaunchBackgroundApplication(Profile* profile,
       const extensions::Extension* extension);
 
   // Returns true if background mode is active.
   virtual bool IsBackgroundModeActive();
 
+  // Suspends background mode until either ResumeBackgroundMode is called or
+  // Chrome is restarted. This has the same effect as ending background mode
+  // for the current browser session.
+  virtual void SuspendBackgroundMode();
+
+  // Resumes background mode. This ends a suspension of background mode, but
+  // will not start it if it is not enabled.
+  virtual void ResumeBackgroundMode();
+
   // For testing purposes.
   int NumberOfBackgroundModeData();
 
  private:
   friend class AppBackgroundPageApiTest;
   friend class BackgroundModeManagerTest;
   friend class TestBackgroundModeManager;
   FRIEND_TEST_ALL_PREFIXES(BackgroundModeManagerTest,
                            BackgroundAppLoadUnload);
   FRIEND_TEST_ALL_PREFIXES(BackgroundModeManagerTest,
@@ skipping 93 matching lines @@
   // Overrides from ProfileInfoCacheObserver
   virtual void OnProfileAdded(const base::FilePath& profile_path) OVERRIDE;
   virtual void OnProfileWillBeRemoved(
       const base::FilePath& profile_path) OVERRIDE;
   virtual void OnProfileNameChanged(const base::FilePath& profile_path,
                                     const string16& old_profile_name) OVERRIDE;
 
   // Overrides from StatusIconMenuModel::Delegate implementation.
   virtual void ExecuteCommand(int command_id, int event_flags) OVERRIDE;
 
+  // chrome::BrowserListObserver implementation.
+  virtual void OnBrowserAdded(Browser* browser) OVERRIDE;
+
   // Invoked when an extension is installed so we can ensure that
   // launch-on-startup is enabled if appropriate. |extension| can be NULL when
   // called from unit tests.
   void OnBackgroundAppInstalled(
       const extensions::Extension* extension);
 
   // Walk the list of profiles and see if an extension or app is being
   // currently upgraded or reloaded by any profile.  If so, update the
   // output variables appropriately.
   void CheckReloadStatus(
       const extensions::Extension* extension,
       bool* is_being_reloaded);
 
   // Called to make sure that our launch-on-startup mode is properly set.
   // (virtual so we can override for tests).
   virtual void EnableLaunchOnStartup(bool should_launch);
 
   // Invoked when a background app is installed so we can display a
   // platform-specific notification to the user.
   virtual void DisplayAppInstalledNotification(
       const extensions::Extension* extension);
 
   // Invoked to put Chrome in KeepAlive mode - chrome runs in the background
   // and has a status bar icon.
   void StartBackgroundMode();
 
-  // Invoked to create the status icon if any profiles currently running
-  // background apps so that there is a way to exit Chrome.
-  void InitStatusTrayIcon();
-
   // Invoked to take Chrome out of KeepAlive mode - chrome stops running in
   // the background and removes its status bar icon.
   void EndBackgroundMode();
 
+  // Enables keep alive and the status tray icon if and only if background mode
+  // is active and not suspended.
+  void UpdateKeepAliveAndTrayIcon();
+
   // If --no-startup-window is passed, BackgroundModeManager will manually keep
   // chrome running while waiting for apps to load. This is called when we no
   // longer need to do this (either because the user has chosen to exit chrome
   // manually, or all apps have been loaded).
   void EndKeepAliveForStartup();
 
   // Return an appropriate name for a Preferences menu entry.  Preferences is
   // sometimes called Options or Settings.
   string16 GetPreferencesMenuLabel();
 
@@ skipping 72 matching lines @@
   // Set when we are keeping chrome running during the startup process - this
   // is required when running with the --no-startup-window flag, as otherwise
   // chrome would immediately exit due to having no open windows.
   bool keep_alive_for_startup_;
 
   // Set to true when Chrome is running with the --keep-alive-for-test flag
   // (used for testing background mode without having to install a background
   // app).
   bool keep_alive_for_test_;
 
+  // Set to true when background mode is suspended.
+  bool background_mode_suspended_;
+
+  // Set to true when background mode is keeping Chrome alive.
+  bool keeping_alive_;
+
   // Provides a command id for each profile as they are created.
   int current_command_id_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundModeManager);
 };
 
 #endif  // CHROME_BROWSER_BACKGROUND_BACKGROUND_MODE_MANAGER_H_