Make AudioWorkletNodeOptions::processorOptions an optional field per spec.
@@ -1539,7 +1539,7 @@ AudioWorkletNodeOptions.prototype.outputChannelCount;
/** @type {!Object<string, number>|undefined} */
AudioWorkletNodeOptions.prototype.parameterData;
-/** @type {?} */
+/** @type {?|undefined} */
AudioWorkletNodeOptions.prototype.processorOptions;
/**
