third_party/WebKit/LayoutTests/virtual/threaded/fast/compositorworker/resources/basic-plumbing-worker-to-main.js

self.importScripts('worker-common.js');

self.onmessage = function(msg) {
  if (msg.data.proxy)
    self.proxy = msg.data.proxy;

  awaitProxyInit(self.proxy).then((proxy) => {
    proxy.opacity = 0.5;
    var transform = proxy.transform;
    transform.m41 = 30.0;
    transform.m44 = 2;
    proxy.transform = transform;
    proxy.scrollLeft = 10;
    proxy.scrollTop = 20;
    postMessage({});
  });
}