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This CL is deceptively large to ensure that test cases with the same
feature flags are somewhat colocated.

Bug: 1035004
Change-Id: Ia09794fab81801269920d0e2403adb5a49e97d65
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1974750
Commit-Queue: Sophie Chang <sophiechang@chromium.org>
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#726139}