Disable background mode when associated pref changes.

BUG=53173
TEST=new BackgroundModeManager unit tests

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=57642

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=57749

Review URL: http://codereview.chromium.org/3205008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@57778 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 15 insertions, 1 deletions

diff --git a/chrome/browser/background_mode_manager.h b/chrome/browser/background_mode_manager.h
index 38b010c..46e8847 100644
--- a/chrome/browser/background_mode_manager.h
+++ b/chrome/browser/background_mode_manager.h
@@ -38,7 +38,7 @@ class BackgroundModeManager
     : private NotificationObserver,
       private menus::SimpleMenuModel::Delegate {
  public:
-  explicit BackgroundModeManager(Profile* profile);
+  BackgroundModeManager(Profile* profile, CommandLine* command_line);
   virtual ~BackgroundModeManager();
 
   static void RegisterUserPrefs(PrefService* prefs);
@@ -49,6 +49,12 @@ class BackgroundModeManager
                            BackgroundAppLoadUnload);
   FRIEND_TEST_ALL_PREFIXES(BackgroundModeManagerTest,
                            BackgroundAppInstallUninstall);
+  FRIEND_TEST_ALL_PREFIXES(BackgroundModeManagerTest,
+                           BackgroundPrefDisabled);
+  FRIEND_TEST_ALL_PREFIXES(BackgroundModeManagerTest,
+                           BackgroundPrefDynamicDisable);
+  FRIEND_TEST_ALL_PREFIXES(BackgroundModeManagerTest,
+                           BackgroundPrefDynamicEnable);
 
   // NotificationObserver implementation.
   virtual void Observe(NotificationType type,
@@ -76,6 +82,9 @@ class BackgroundModeManager
   // launch-on-startup is disabled if appropriate.
   void OnBackgroundAppUninstalled();
 
+  // Invoked when the kBackgroundModeEnabled preference has changed.
+  void OnBackgroundModePrefChanged();
+
   // Returns true if the passed extension is a background app.
   bool IsBackgroundApp(Extension* extension);
 
@@ -121,6 +130,11 @@ class BackgroundModeManager
   // The number of background apps currently loaded.
   int background_app_count_;
 
+  // Set to true when we are running in background mode. Allows us to track our
+  // current background state so we can take the appropriate action when the
+  // user disables/enables background mode via preferences.
+  bool in_background_mode_;
+
   // Reference to our status tray (owned by our parent profile). If null, the
   // platform doesn't support status icons.
   StatusTray* status_tray_;