def ExpireBreakpoint(self):
    """Expires this breakpoint."""
    # Let only one thread capture the data and complete the breakpoint.
    if not self._SetCompleted():
      return

    if self.definition.get('action') == 'LOG':
      message = ERROR_AGE_LOGPOINT_EXPIRED_0
    else:
      message = ERROR_AGE_SNAPSHOT_EXPIRED_0
    self._CompleteBreakpoint({
        'status': {
            'isError': True,
            'refersTo': 'BREAKPOINT_AGE',
            'description': {'format': message}}})
Expires this breakpoint.