chromium/src/third_party/blink/web_tests/fast/workers/chromium/resources/wrapper-map-gc.js - manifest_repos/chromium_src - Git at Google

 onmessage = function(event) {
     // This quickly creates a need for GC.
     postMessage(event.data + event.data);
 }

 // Trigger the ping-pong.
 postMessage("kaboom?");
	onmessage = function(event) {
	// This quickly creates a need for GC.
	postMessage(event.data + event.data);
	}

	// Trigger the ping-pong.
	postMessage("kaboom?");