GitLab

This CL disables back-forward cache for the tests which want
to cover scenarios without documents being preserved in the
cache and adds new tests which require to test the functionality
when BackForwardCache is enabled.

BUG=1102629

Change-Id: Ib26902c1a590d252030ec5d5105299cb0ef895c3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2354242Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Reviewed-by: Alexander Timin <altimin@chromium.org>
Commit-Queue: Sreeja Kamishetty <sreejakshetty@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800043}