Stop guest user on exiting, to conserve resources

            }

            mUserSwitchObservers.finishBroadcast();

        }

        stopGuestUserIfBackground();

    }

    /**

     * Stops the guest user if it has gone to the background.

     */

    private void stopGuestUserIfBackground() {

        synchronized (this) {

            final int num = mUserLru.size();

            for (int i = 0; i < num; i++) {

                Integer oldUserId = mUserLru.get(i);

                UserStartedState oldUss = mStartedUsers.get(oldUserId);

                if (oldUserId == UserHandle.USER_OWNER || oldUserId == mCurrentUserId

                        || oldUss.mState == UserStartedState.STATE_STOPPING

                        || oldUss.mState == UserStartedState.STATE_SHUTDOWN) {

                    continue;

                }

                UserInfo userInfo = mUserManager.getUserInfo(oldUserId);

                if (userInfo.isGuest()) {

                    // This is a user to be stopped.

                    stopUserLocked(oldUserId, null);

                    break;

                }

            }

        }

    }

    void scheduleStartProfilesLocked() {