Add expectation for failing Object_keys test

This failure is currently blocking CQ on both Dawn and Chromium.

Bug: 391917953
No-Try: true
Change-Id: I1b63ff7befb7592ee89cada12bf0933d65bda1fa
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/223215
Commit-Queue: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Kai Ninomiya <kainino@chromium.org>
Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
diff --git a/webgpu-cts/expectations.txt b/webgpu-cts/expectations.txt
index 901d269..fc2ff85 100644
--- a/webgpu-cts/expectations.txt
+++ b/webgpu-cts/expectations.txt
@@ -5565,6 +5565,8 @@
 crbug.com/373485785 [ intel win10 ] webgpu:shader,execution,zero_init:compute,zero_init:addressSpace="workgroup";* [ RetryOnFailure ]
 crbug.com/373485785 [ target-cpu-32 ] webgpu:shader,execution,zero_init:compute,zero_init:addressSpace="workgroup";* [ RetryOnFailure ]
 
+crbug.com/391917953 [ webgpu-service-worker linux release ] webgpu:idl,javascript:obj,Object_keys:type="adapter.limits" [ Failure ]
+
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