[atomics] Add WPT for Atomics.waitAsync

Bug: v8:10239
Change-Id: Ie478aed6e069d23964331fa07bfe190c55798ab3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4545947
Reviewed-by: Domenic Denicola <domenic@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1146132}

html/webappapis/scripting/processing-model-2/integration-with-the-javascript-agent-formalism/atomics-wait-async.https.any.js

@@ -0,0 +1,25 @@
+// META: global=window,dedicatedworker
+
+promise_test(async () => {
+  const sab = new SharedArrayBuffer(64);
+  const ta = new Int32Array(sab);
+
+  const waitAsyncObj = Atomics.waitAsync(ta, 0, 0, 10);
+  assert_equals(waitAsyncObj.async, true);
+  const v = await waitAsyncObj.value;
+  assert_equals(v, "timed-out");
+}, `Atomics.waitAsync timeout in a ${self.constructor.name}`);
+
+promise_test(async () => {
+  const sab = new SharedArrayBuffer(64);
+  const ta = new Int32Array(sab);
+
+  const waitAsyncObj = Atomics.waitAsync(ta, 0, 0);
+  assert_equals(waitAsyncObj.async, true);
+
+  const worker = new Worker("resources/notify-worker.js");
+  worker.postMessage(sab);
+
+  const v = await waitAsyncObj.value;
+  assert_equals(v, "ok");
+}, `Atomics.waitAsync notification in a ${self.constructor.name}`);

html/webappapis/scripting/processing-model-2/integration-with-the-javascript-agent-formalism/atomics-wait-async.https.any.js.headers

@@ -0,0 +1,2 @@
+Cross-Origin-Embedder-Policy: require-corp
+Cross-Origin-Opener-Policy: same-origin

html/webappapis/scripting/processing-model-2/integration-with-the-javascript-agent-formalism/resources/notify-worker.js

@@ -0,0 +1,5 @@
+onmessage = (e) => {
+  const sab = e.data;
+  const ta = new Int32Array(sab);
+  Atomics.notify(ta, 0);
+};

html/webappapis/scripting/processing-model-2/integration-with-the-javascript-agent-formalism/resources/notify-worker.js.headers

@@ -0,0 +1 @@
+Cross-Origin-Embedder-Policy: require-corp