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Note: Currently SiteList test is disabled for flakiness. Re-enabled to
test locally, and fixed a few consistent errors that likely appeared
since the test was disabled. Did not observe any failures in 10 runs
locally so will try to re-enable this test in a separate CL.

Bug: 1026426
Change-Id: I72eead1d0fe4d70052ad7c1333a9c7b2ed104c9a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2109410
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Reviewed-by: dpapad <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#751921}