Keep UnderlyingSourceAlgorithms alive until it's explicitly closed

1. Adding mAsyncWaitAlgorithms to match mAsyncWaitWorkerRef and keep the algorithms object just like how the workerref is kept right now.
2. Closing mInput also on the window teardown, to prevent memory leak as Fetch does not close the stream automatically.

Depends on D193295

Differential Revision: https://phabricator.services.mozilla.com/D190058

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1849860
gecko-commit: b81979c8bd150c344ec943a6ccb0c14b39371478
gecko-reviewers: smaug, asuth

FileAPI/blob/Blob-stream.any.js

@@ -70,7 +70,18 @@ promise_test(async() => {
   await garbageCollect();
   const chunks = await read_all_chunks(stream, { perform_gc: true });
   assert_array_equals(chunks, input_arr);
-}, "Blob.stream() garbage collection of blob shouldn't break stream" +
+}, "Blob.stream() garbage collection of blob shouldn't break stream " +
+      "consumption")
+
+promise_test(async() => {
+  const input_arr = [8, 241, 48, 123, 151];
+  const typed_arr = new Uint8Array(input_arr);
+  let blob = new Blob([typed_arr]);
+  const chunksPromise = read_all_chunks(blob.stream());
+  // It somehow matters to do GC here instead of doing `perform_gc: true`
+  await garbageCollect();
+  assert_array_equals(await chunksPromise, input_arr);
+}, "Blob.stream() garbage collection of stream shouldn't break stream " +
       "consumption")
 
 promise_test(async () => {