Add CTS telemetry harness support

Migrates harness support files added in
https://chromium-review.googlesource.com/c/chromium/src/+/3541414
into Dawn's repo.

Tested in
https://chromium-review.googlesource.com/c/chromium/src/+/3537743

Bug: chromium:1306640
Change-Id: I3000b1223219a1da293af910bf442570b70b7c92
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/84043
Reviewed-by: Loko Kung <lokokung@google.com>
Commit-Queue: Austin Eng <enga@chromium.org>

webgpu-cts/test_runner.js

@@ -0,0 +1,65 @@
+// Copyright 2022 The Dawn Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { DefaultTestFileLoader } from '../third_party/webgpu-cts/src/common/internal/file_loader.js';
+import { prettyPrintLog } from '../third_party/webgpu-cts/src/common/internal/logging/log_message.js';
+import { Logger } from '../third_party/webgpu-cts/src/common/internal/logging/logger.js';
+import { parseQuery } from '../third_party/webgpu-cts/src/common/internal/query/parseQuery.js';
+
+import { TestWorker } from '../third_party/webgpu-cts/src/common/runtime/helper/test_worker.js';
+
+var socket;
+
+async function setupWebsocket(port) {
+  socket = new WebSocket('ws://127.0.0.1:' + port)
+  socket.addEventListener('message', runCtsTestViaSocket);
+}
+
+async function runCtsTestViaSocket(event) {
+  let input = JSON.parse(event.data);
+  runCtsTest(input['q'], input['w']);
+}
+
+async function runCtsTest(query, use_worker) {
+  const workerEnabled = use_worker;
+  const worker = workerEnabled ? new TestWorker(false) : undefined;
+
+  const loader = new DefaultTestFileLoader();
+  const filterQuery = parseQuery(query);
+  const testcases = await loader.loadCases(filterQuery);
+
+  const expectations = [];
+
+  const log = new Logger();
+
+  for (const testcase of testcases) {
+    const name = testcase.query.toString();
+
+    const wpt_fn = async () => {
+      const [rec, res] = log.record(name);
+      if (worker) {
+        await worker.run(rec, name, expectations);
+      } else {
+        await testcase.run(rec, expectations);
+      }
+
+      socket.send(JSON.stringify({'s': res.status,
+                                  'l': (res.logs ?? []).map(prettyPrintLog)}));
+    };
+    await wpt_fn();
+  }
+}
+
+window.runCtsTest = runCtsTest;
+window.setupWebsocket = setupWebsocket