removeListener() {
    if (!this.hasListener_) {
      return;
    }
    this.eventHandler_.removeListener(this.listener_);
    this.hasListener_ = false;
  }
/**
   * Removes event listener. The next time extension wakes up, the event
   * listener will not be added back during |addOnStartup|.
   */
Removes event listener. The next time extension wakes up, the event
listener will not be added back during |addOnStartup|.
Removes event listener . The next time extension wakes up the event listener will not be added back during |addOnStartup| .
removeListener() {
    if (!this.hasListener_) {
      return;
    }
    this.eventHandler_.removeListener(this.listener_);
    this.hasListener_ = false;
  }
removeListener ( ) { if ( ! this . hasListener_ ) { return ; } this . eventHandler_ . removeListener ( this . listener_ ) ; this . hasListener_ = false ; }
Removes event listener.
Removes event listener .