Remove CHECK in WebContentsObserverSanityChecker::DidStopLoading

The check causes low-level browser_test flake across a wide variety of
test suites, usually due to check failures during test suite teardown.
This is test-only code, so relax the check until the root cause can be
investigated further.

Bug: 466089, 871010, 913006, 915360, 919347
Test: browser_tests
Change-Id: Ife2ab6a6d260471f79873b6f0fd2914a4c7bb71d
Reviewed-by: Camille Lamy <>
Commit-Queue: James Cook <>
Cr-Commit-Position: refs/heads/master@{#622067}
1 file changed