Fixes a typo: disabled_extension_ids_ should not be cleared here.

chrome/browser/notifications/desktop_notification_service.cc

Index: chrome/browser/notifications/desktop_notification_service.cc
diff --git a/chrome/browser/notifications/desktop_notification_service.cc b/chrome/browser/notifications/desktop_notification_service.cc
index 642e8c43ffa482bfb08957649fbd376a06e3900e..e2127ea9366e591bcd26c70b7c8fa5350ede839a 100644
--- a/chrome/browser/notifications/desktop_notification_service.cc
+++ b/chrome/browser/notifications/desktop_notification_service.cc
@@ -611,7 +611,7 @@ void DesktopNotificationService::SetSystemComponentEnabled(
 }
 
 void DesktopNotificationService::OnDisabledSystemComponentIdsChanged() {
-  disabled_extension_ids_.clear();
+  disabled_system_component_ids_.clear();
   CopySetFromPrefToMemory(profile_->GetPrefs(),
                           prefs::kMessageCenterDisabledSystemComponentIds,
                           &disabled_system_component_ids_);