Revert "Add resource load priority Service Worker tests"

This reverts commit 0f0d0b74.

Reason for revert: super flaky on win7_chromium_rel_ng

BUG=chromium:872776

Original change's description:
> Add resource load priority Service Worker tests
> 
> This CL adds resource load priority tests ensuring that the priority of
> requests that pass through a Service Worker is preserved.
> 
> R=​kinuko@chromium.org, kouhei@chromium.org, yhirano@chromium.org
> 
> Bug: 872776
> Change-Id: I74f334359b3255fcac5c13fbdb9f1e601af0f8f0
> Reviewed-on: https://chromium-review.googlesource.com/c/1316104
> Commit-Queue: Dominic Farolino <domfarolino@gmail.com>
> Reviewed-by: Matt Falkenhagen <falken@chromium.org>
> Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
> Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
> Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#606689}

TBR=falken@chromium.org,kinuko@chromium.org,yhirano@chromium.org,kouhei@chromium.org,domfarolino@gmail.com

Change-Id: I6d997795ffc64f1005ed3821799300cd3401eea9
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 872776
Reviewed-on: https://chromium-review.googlesource.com/c/1329245Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606822}

third_party/WebKit/LayoutTests/http/tests/priorities/resource-load-priorities-service-worker.https-expected.txt

-This is a testharness.js-based test.
-PASS registering service worker
-PASS Requests from the Fetch API passing through a Service Worker should be loaded with kHigh priority
-PASS Render-blocking style sheets requests passing through a Service Worker should be loaded with kVeryHigh priority
-FAIL Async scripts passing through a Service Worker should be loaded with kLow priority assert_equals: expected 1 but got 3
-FAIL Deferred scripts passing through a Service Worker should be loaded with kLow priority assert_equals: expected 1 but got 3
-PASS Module scripts passing through a Service Worker should be loaded with kHigh priority
-PASS XHRs passing through a Service Worker should be loaded with kHigh priority
-PASS Parser-blocking scripts passing through a Service Worker should be loaded with kHigh priority
-FAIL Off-screen images passing through a Service Worker should be loaded with kLow priority assert_equals: expected 1 but got 3
-FAIL Prefetches passing through a Service Worker should be loaded with kLowest priority assert_equals: expected 0 but got 3
-PASS unregistering service worker
-Harness: the test ran to completion.
-

third_party/WebKit/LayoutTests/http/tests/priorities/resource-load-priorities-service-worker.https.html

-<title>ResourceLoadPriority tests through Service Worker</title>
-
-<script src="resources/common.js"></script>
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/serviceworker/resources/test-helpers.js"></script>
-
-<script>
-function openWindow(url, t) {
-  const win = window.open(url, '_blank');
-  t.add_cleanup(() => win.close());
-}
-
-function resource_load_priority_service_worker_test(url, expected_priority,
-                                                    description) {
-  promise_test(t => {
-    const serviceWorkerPriority = new Promise(resolve => {
-      navigator.serviceWorker.onmessage = resolve;
-    });
-
-    const subresourceFinishedLoading = new Promise(resolve => {
-      window.onmessage = e => {
-        assert_not_equals(e.data, 'FAILED',
-        `Resources requested in the test window ${url} should have loaded`);
-        resolve();
-      }
-    });
-
-    openWindow(url, t);
-
-    return Promise.all([serviceWorkerPriority, subresourceFinishedLoading])
-      .then(promiseValues => {
-        // Return the promise value associated with the service worker priority event.
-        return promiseValues[0];
-      })
-      .then(priority_event => {
-        assert_not_equals(priority_event.data, 'FAILED',
-          'The resource failed to load for some reason.');
-        assert_equals(priority_event.data, expected_priority);
-      });
-  }, description);
-}
-
-promise_test(t => {
-  return service_worker_unregister_and_register(t,
-    'service-worker-get-priority.js', '/priorities/')
-    .then(r => {
-      return wait_for_state(t, r.installing, 'activated');
-    });
-}, 'registering service worker');
-
-resource_load_priority_service_worker_test(
-  'resources/service-worker/fetch.html', kHigh,
-  'Requests from the Fetch API passing through a Service Worker should be ' +
-  'loaded with kHigh priority');
-
-resource_load_priority_service_worker_test(
-  'resources/service-worker/render-blocking-stylesheet.html', kVeryHigh,
-  'Render-blocking style sheets requests passing through a Service Worker ' +
-  'should be loaded with kVeryHigh priority');
-
-resource_load_priority_service_worker_test(
-  'resources/service-worker/async-script.html', kLow,
-  'Async scripts passing through a Service Worker should be loaded with kLow ' +
-  'priority');
-
-resource_load_priority_service_worker_test(
-  'resources/service-worker/defer-script.html', kLow,
-  'Deferred scripts passing through a Service Worker should be loaded with ' +
-  'kLow priority');
-
-resource_load_priority_service_worker_test(
-  'resources/service-worker/module-script.html', kHigh,
-  'Module scripts passing through a Service Worker should be loaded with ' +
-  'kHigh priority');
-
-resource_load_priority_service_worker_test(
-  'resources/service-worker/xhr.html', kHigh,
-  'XHRs passing through a Service Worker should be loaded with kHigh priority');
-
-resource_load_priority_service_worker_test(
-  'resources/service-worker/parser-blocking-script.html', kHigh,
-  'Parser-blocking scripts passing through a Service Worker should be loaded ' +
-  'with kHigh priority');
-
-resource_load_priority_service_worker_test(
-  'resources/service-worker/off-screen-image.html', kLow,
-  'Off-screen images passing through a Service Worker should be loaded with ' +
-  'kLow priority');
-
-resource_load_priority_service_worker_test(
-  'resources/service-worker/prefetch.html', kVeryLow,
-  'Prefetches passing through a Service Worker should be loaded with kLowest ' +
-  'priority');
-
-// TODO(domfarolino): Add a synchronous XHR test when https://crbug.com/602051
-// is resolved.
-
-promise_test(t => {
-  return service_worker_unregister(t, '/priorities/');
-}, 'unregistering service worker');
-</script>

third_party/WebKit/LayoutTests/http/tests/priorities/resources/common.js

@@ -5,8 +5,7 @@
  * and in these tests, we use the below variables to represent
  * the exposed values in a readable way.
  */
-const kVeryLow = 0,
-      kLow = 1,
+const kLow = 1,
       kMedium = 2,
       kHigh = 3,
       kVeryHigh = 4;
@@ -17,10 +16,6 @@ function reportPriority(url, optionalDoc) {
   window.opener.postMessage(loadPriority, '*');
 }
 
-function reportLoaded() {
-  window.opener.postMessage('LOADED', '*');
-}
-
 function reportFailure() {
   window.opener.postMessage('FAILED', '*');
 }

third_party/WebKit/LayoutTests/http/tests/priorities/resources/service-worker/async-script.html

-<script src="../common.js"></script>
-<script src="../../../resources/dummy.js?async&getPriority" async onload="reportLoaded()" onerror="reportFailure()"></script>

third_party/WebKit/LayoutTests/http/tests/priorities/resources/service-worker/defer-script.html

-<script src="../common.js"></script>
-<script src="../../../resources/dummy.js?defer&getPriority" defer onload="reportLoaded()" onerror="reportFailure()"></script>

third_party/WebKit/LayoutTests/http/tests/priorities/resources/service-worker/fetch.html

-<script src="../common.js"></script>
-<script>
-  fetch('../../../resources/dummy.html?getPriority')
-    .then(reportLoaded, reportFailure);
-</script>

third_party/WebKit/LayoutTests/http/tests/priorities/resources/service-worker/module-script.html

-<script src="../common.js"></script>
-<script src="../../../resources/dummy.js?module&getPriority" type=module onload="reportLoaded()" onerror="reportFailure()"></script>

third_party/WebKit/LayoutTests/http/tests/priorities/resources/service-worker/off-screen-image.html

-<script src="../common.js"></script>
-<script>
-  const image = new Image();
-  image.src = '../../../resources/square.png?getPriority';
-
-  image.onload = reportLoaded;
-  image.onerror = reportFailure;
-</script>

third_party/WebKit/LayoutTests/http/tests/priorities/resources/service-worker/parser-blocking-script.html

-<script src="../common.js"></script>
-<script src="../../../resources/dummy.js?normal&getPriority" onload="reportLoaded()" onerror="reportFailure()"></script>

third_party/WebKit/LayoutTests/http/tests/priorities/resources/service-worker/prefetch.html

-<script src="../common.js"></script>
-<link rel=prefetch href="../../../resources/dummy.html?getPriority" onload="reportLoaded()" onerror="reportFailure()">

third_party/WebKit/LayoutTests/http/tests/priorities/resources/service-worker/render-blocking-stylesheet.html

-<script src="../common.js"></script>
-
-<!-- Media-matching style sheets block rendering, and are critical -->
-<link rel="stylesheet" href="../../../resources/dummy.css?getPriority" onload="reportLoaded()" onerror="reportFailure()">

third_party/WebKit/LayoutTests/http/tests/priorities/resources/service-worker/xhr.html

-<script src="../common.js"></script>
-<script>
-  const xhr = new XMLHttpRequest();
-  xhr.open('GET', '../../../resources/dummy.html?getPriority');
-  xhr.send();
-
-  xhr.onload = reportLoaded;
-  xhr.onerror = reportFailure;
-</script>

third_party/WebKit/LayoutTests/http/tests/priorities/service-worker-get-priority.js

-addEventListener('fetch', e => {
-  if (e.request.url.endsWith('getPriority'))
-    e.respondWith(fetchAndMessagePriority(e.request));
-});
-
-async function fetchAndMessagePriority(request) {
-  const response = await fetch(request);
-  const priority = internals.getResourcePriority(request.url, this);
-  const clientArray = await clients.matchAll({includeUncontrolled: true});
-  clientArray.forEach(client => {
-    client.postMessage(priority);
-  });
-
-  return response;
-}