Add a web platform test to verify various aspects of creating workers from blobs.

Bug: 852249, 800898
Change-Id: Ic885db66683d40f259f4f8c0ddf82d6ea3b4c144
Reviewed-on: https://chromium-review.googlesource.com/1099361
Commit-Queue: Marijn Kruisselbrink <mek@chromium.org>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567308}

third_party/WebKit/LayoutTests/TestExpectations

@@ -2797,6 +2797,7 @@ crbug.com/751952 virtual/origin-trials-runtimeflags-disabled/http/tests/origin_t
 crbug.com/800898 external/wpt/FileAPI/url/url-with-fetch.any.worker.html [ Pass Failure ]
 crbug.com/800898 external/wpt/FileAPI/url/url-with-xhr.any.worker.html [ Pass Failure ]
 crbug.com/800898 external/wpt/FileAPI/url/url-in-tags-revoke.window.html [ Timeout ]
+crbug.com/800898 external/wpt/workers/worker-from-blob-url.window.html [ Timeout ]
 
 crbug.com/849737 virtual/mojo-blob-urls/external/wpt/FileAPI/url/sandboxed-iframe.html [ Pass Timeout ]
 crbug.com/849737 virtual/mojo-blob-urls/external/wpt/FileAPI/url/url-format.any.html [ Pass Timeout ]

third_party/WebKit/LayoutTests/external/wpt/workers/worker-from-blob-url.window.js

+function message_from_port(port) {
+  return new Promise(resolve => {
+    port.onmessage = e => resolve(e.data);
+  });
+}
+
+promise_test(async t => {
+  const run_result = 'worker_OK';
+  const blob_contents = 'self.postMessage("' + run_result + '");';
+  const blob = new Blob([blob_contents]);
+  const url = URL.createObjectURL(blob);
+
+  const worker = new Worker(url);
+  const reply = await message_from_port(worker);
+  assert_equals(reply, run_result);
+}, 'Creating a dedicated worker from a blob URL works.');
+
+promise_test(async t => {
+  const run_result = 'worker_OK';
+  const blob_contents = 'self.postMessage("' + run_result + '");';
+  const blob = new Blob([blob_contents]);
+  const url = URL.createObjectURL(blob);
+
+  const worker = new Worker(url);
+  URL.revokeObjectURL(url);
+  const reply = await message_from_port(worker);
+  assert_equals(reply, run_result);
+}, 'Creating a dedicated worker from a blob URL works immediately before revoking.');
+
+promise_test(async t => {
+  const run_result = 'worker_OK_';
+  const blob_contents =
+    'self.counter = 0; self.onconnect = e => {++self.counter;' +
+    'e.source.postMessage("' + run_result + '" + self.counter); };';
+  const blob = new Blob([blob_contents]);
+  const url = URL.createObjectURL(blob);
+
+  const worker1 = new SharedWorker(url);
+  const reply1 = await message_from_port(worker1.port);
+  assert_equals(reply1, run_result + '1');
+  const worker2 = new SharedWorker(url);
+  const reply2 = await message_from_port(worker2.port);
+  assert_equals(reply2, run_result + '2');
+}, 'Creating a shared worker from a blob URL works.');
+
+promise_test(async t => {
+  const run_result = 'worker_OK';
+  const blob_contents =
+    'self.onconnect = e => { e.source.postMessage("' + run_result + '"); };';
+  const blob = new Blob([blob_contents]);
+  const url = URL.createObjectURL(blob);
+
+  const worker = new SharedWorker(url);
+  URL.revokeObjectURL(url);
+
+  const reply = await message_from_port(worker.port);
+  assert_equals(reply, run_result);
+}, 'Creating a shared worker from a blob URL works immediately before revoking.');
+
+
+promise_test(async t => {
+  const run_result = 'worker_OK_';
+  const blob_contents =
+    'self.counter = 0; self.onconnect = e => {++self.counter;' +
+    'e.source.postMessage("' + run_result + '" + self.counter); };';
+  const blob = new Blob([blob_contents]);
+  const url = URL.createObjectURL(blob);
+
+  const worker1 = new SharedWorker(url);
+  URL.revokeObjectURL(url);
+
+  const reply1 = await message_from_port(worker1.port);
+  assert_equals(reply1, run_result + '1');
+  const worker2 = new SharedWorker(url);
+  const reply2 = await message_from_port(worker2.port);
+  assert_equals(reply2, run_result + '2');
+}, 'Connecting to a shared worker on a revoked blob URL works.');