Disable more flaky NoStatePrefetchBrowserTest tests.

Bug: 1144282
Change-Id: I34dc157afdd184ea0a49194d500c66bf0c18d696
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2639580


Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#847433}