setFieldOfView(fieldOfView) {
    if (!this.vrWebgl_) {
      shaka.log.alwaysWarn('Not playing VR content');
      return;
    }
    if (fieldOfView < 0) {
      shaka.log.alwaysWarn('Field of view should be greater than 0');
      fieldOfView = 0;
    } else if (fieldOfView > 100) {
      shaka.log.alwaysWarn('Field of view should be less than 100');
      fieldOfView = 100;
    }
    this.vrWebgl_.setFieldOfView(fieldOfView);
  }
Set the field of view.

@param {number} fieldOfView