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Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/32487da8d09caf3eb72b9c70f60887e2237f4751 (Move Feature Policy parser from platform to core).

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Looks like SecurityOrigin treats multiply-wrapped URLs (like blob:filesystem:xxxxxxx) as valid, and non-opaque, while url::Origin rejects them as invalid tuple origins. The mismatch triggers a DCHECK in SecurityOrigin::ToUrlOrigin.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2984d826c17a8bc7d01c1344aea831a674ee1e75

commit 2984d826c17a8bc7d01c1344aea831a674ee1e75
Author: Ian Clelland <iclelland@chromium.org>
Date: Mon Nov 26 22:15:41 2018

Treat multiply-wrapped URLs as opaque

Bug:  906357 
Change-Id: I1fab7e52c71a7358a5f22e2fc99cda064b29918d
Reviewed-on: https://chromium-review.googlesource.com/c/1348257
Reviewed-by: Mike West <mkwst@chromium.org>
Commit-Queue: Ian Clelland <iclelland@chromium.org>
Cr-Commit-Position: refs/heads/master@{#610960}
[modify] https://crrev.com/2984d826c17a8bc7d01c1344aea831a674ee1e75/third_party/blink/renderer/platform/weborigin/security_origin.cc
[modify] https://crrev.com/2984d826c17a8bc7d01c1344aea831a674ee1e75/third_party/blink/renderer/platform/weborigin/security_origin_test.cc

ClusterFuzz has detected this issue as fixed in range 610959:610960.

Detailed report: https://clusterfuzz.com/testcase?key=6475906498166784

Fuzzer: libFuzzer_feature_policy_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  !result.opaque() in security_origin.cc
  blink::SecurityOrigin::ToUrlOrigin
  blink::ParseFeaturePolicy
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=598890:598907
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=610959:610960

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6475906498166784

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reference.md for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

ClusterFuzz testcase 6475906498166784 is verified as fixed, so closing issue as verified.

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