@TargetApi(Build.VERSION_CODES.LOLLIPOP) private static boolean moveToFront(AppTask task){
  try {
    task.moveToFront();
    return true;
  }
 catch (  SecurityException e) {
    sMoveToFrontExceptionHistogram.recordHit();
  }
  return false;
}

@ TargetApi ( Build . VERSION_CODES . LOLLIPOP ) private static boolean moveToFront ( AppTask task ) { try { task . moveToFront ( ) ; return true ; } catch ( SecurityException e ) { sMoveToFrontExceptionHistogram . recordHit ( ) ; } return false ; }
attempt to move a task back to the front . this can fail for some reason because the uid of the documentactivity we try to bring back to the front doesn ' t match the chromelauncheractivities .
