Restore post-harness.js

tests/wpt-harness/post-harness.js

@@ -78,6 +78,52 @@ async function loadMetaScript(path, base) {
 
 addEventListener("fetch", event => event.respondWith(handleRequest(event)));
 
+{
+  let timeout_id = 0;
+  let cleared_ids = new Set();
+
+  function setTimeout(func, delay, ...args) {
+    return run_timeout(func, delay, args, false);
+  }
+
+  function setInterval(func, delay, ...args) {
+    return run_timeout(func, delay, args, true);
+  }
+
+  function run_timeout(func, delay, args, repeat) {
+    let id = timeout_id++;
+    let iterations = 100;
+    function wait() {
+      if (cleared_ids.has(id)) {
+        return;
+      }
+      if (iterations--) {
+        return Promise.resolve().then(wait);
+      }
+      try {
+        func(...args);
+      } catch (e) {
+        console.log(`Error caught running ${repeat ? "setInterval" : "setTimout"} callback: ${e}`);
+      }
+
+      if (repeat) {
+        iterations = 100;
+        wait();
+      }
+    }
+    wait();
+    return id;
+  }
+
+  function clearTimeout(id) {
+    cleared_ids.add(id);
+  }
+
+  function clearInterval(id) {
+    cleared_ids.add(id);
+  }
+}
+
 self.GLOBAL = {
   isWindow: () => false,
   isWorker: () => true,