Add tests for worker's URLs intercepted by ServiceWorker

This CL checks worker global scopes' URLs (self.location) in the
cases where worker top-level scripts are intercepted by
ServiceWorkers.

The test failure introduced in this CL will be fixed by
https://chromium-review.googlesource.com/1153598.

Bug: 861564
Change-Id: Ia92e1de697b5b9c6a61ab8e5c5abcaaf6dcee777
Reviewed-on: https://chromium-review.googlesource.com/1157220Reviewed-by: Hiroki Nakagawa <nhiroki@chromium.org>
Commit-Queue: Hiroshige Hayashizaki <hiroshige@chromium.org>
Cr-Commit-Position: refs/heads/master@{#580041}

third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/resources/worker-interception-redirect-webworker.js

@@ -39,4 +39,6 @@ self.onconnect = async function(e) {
   const response = await fetch(fetch_url);
   const text = await response.text();
   port.postMessage('fetch(): ' + text);
+
+  port.postMessage(self.location.href);
 };

third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/worker-interception-redirect.https-expected.txt

@@ -2,7 +2,7 @@ This is a testharness.js-based test.
 PASS initialize global state
 FAIL request to sw1 scope gets network redirect to sw2 scope assert_equals: expected "the shared worker script was served from network" but got "sw2 saw the request for the worker script"
 FAIL request to sw1 scope gets network redirect to out-of-scope assert_equals: expected "sw1 saw importScripts from the worker" but got "importScripts: served from network"
-PASS request to sw1 scope gets service-worker redirect to sw2 scope
+FAIL request to sw1 scope gets service-worker redirect to sw2 scope assert_equals: location.href expected "https://web-platform.test:8444/service-workers/service-worker/resources/worker_interception_redirect_webworker.py?greeting=sw2%20saw%20the%20request%20for%20the%20worker%20script" but got "https://web-platform.test:8444/service-workers/service-worker/resources/scope2/worker_interception_redirect_webworker.py"
 FAIL request to sw1 scope gets service-worker redirect to out-of-scope assert_equals: expected "sw1 saw importScripts from the worker" but got "importScripts: served from network"
 PASS cleanup global state
 Harness: the test ran to completion.

third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/worker-interception-redirect.https.html

@@ -107,7 +107,8 @@ promise_test(async t => {
   }, 'cleanup global state');
 }, 'initialize global state');
 
-function worker_redirect_test(worker_url,
+function worker_redirect_test(worker_request_url,
+                              worker_expected_url,
                               expected_main_resource_message,
                               expected_import_scripts_message,
                               expected_fetch_message,
@@ -119,7 +120,7 @@ function worker_redirect_test(worker_url,
     t.add_cleanup(() => { frame.remove(); });
 
     // Start the worker.
-    const w = new frame.contentWindow.SharedWorker(worker_url);
+    const w = new frame.contentWindow.SharedWorker(worker_request_url);
     w.port.start();
 
     // Expect a message from the worker indicating which service worker
@@ -137,11 +138,19 @@ function worker_redirect_test(worker_url,
     // which service worker provided the response for the fetch(), if any.
     const fetch_message = await get_message_from_worker(w);
     assert_equals(fetch_message, expected_fetch_message);
+
+    // Expect a message from the worker indicating |self.location|.
+    const worker_actual_url = await get_message_from_worker(w);
+    assert_equals(
+      worker_actual_url,
+      (new URL(worker_expected_url, location.href)).toString(),
+      'location.href');
   }, description);
 }
 
 worker_redirect_test(
     build_worker_url('network', 'scope2'),
+    'resources/scope2/worker_interception_redirect_webworker.py',
     'the shared worker script was served from network',
     'sw1 saw importScripts from the worker',
     'fetch(): sw1 saw the fetch from the worker',
@@ -149,6 +158,7 @@ worker_redirect_test(
 
 worker_redirect_test(
     build_worker_url('network', 'out-scope'),
+    'resources/worker_interception_redirect_webworker.py',
     'the shared worker script was served from network',
     'sw1 saw importScripts from the worker',
     'fetch(): sw1 saw the fetch from the worker',
@@ -156,6 +166,7 @@ worker_redirect_test(
 
 worker_redirect_test(
     build_worker_url('serviceworker', 'scope2'),
+    'resources/worker_interception_redirect_webworker.py?greeting=sw2%20saw%20the%20request%20for%20the%20worker%20script',
     'sw2 saw the request for the worker script',
     'sw2 saw importScripts from the worker',
     'fetch(): sw2 saw the fetch from the worker',
@@ -163,6 +174,7 @@ worker_redirect_test(
 
 worker_redirect_test(
     build_worker_url('serviceworker', 'out-scope'),
+    'resources/worker_interception_redirect_webworker.py',
     'the shared worker script was served from network',
     'sw1 saw importScripts from the worker',
     'fetch(): sw1 saw the fetch from the worker',