Revert "Deflake permission observation WPT by ignoring the event target"

This reverts commit 90d9a1b12b4fafec7c3c843b231fd4ed24afe88a.

Reason for revert: flakiness dashboard indicates this test is still flaky even with this change, so this CL was not successful.

Original change's description:
> Deflake permission observation WPT by ignoring the event target
>
> This just hides the underlying problem, that the event is being fired
> at the wrong target sometimes (if my hypothesis is correct, anyway).
> But it will fix the flake, so we don't have to disable this test or
> ignore its status.
>
> Bug: 1427214
> Change-Id: Ic97acb53d95077264e34253adc25a125b3ce1685
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4368364
> Commit-Queue: Chris Fredrickson <cfredric@chromium.org>
> Auto-Submit: Chris Fredrickson <cfredric@chromium.org>
> Reviewed-by: Johann Hofmann <johannhof@chromium.org>
> Commit-Queue: Johann Hofmann <johannhof@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1121755}

Bug: 1427214
Change-Id: Ia45f4ebf5c12c539303f816004f9a265ecb0b4d2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4374078
Commit-Queue: Chris Fredrickson <cfredric@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1122390}
diff --git a/storage-access-api/resources/embedded_responder.js b/storage-access-api/resources/embedded_responder.js
index 6d42096..ab1ab30 100644
--- a/storage-access-api/resources/embedded_responder.js
+++ b/storage-access-api/resources/embedded_responder.js
@@ -34,7 +34,7 @@
     case "observe_permission_change":
       const status = await navigator.permissions.query({name: "storage-access"});
       status.addEventListener("change", (event) => {
-        reply(status.state)
+        reply(event.target.state)
       }, { once: true });
       break;
     case "reload":