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- This will give the consumer the ability to discard the old content
ASAP.
- Also change the test to make it pass on BFCache feature.

Bug: 1115234
Change-Id: Ib41f5642018e6e11c919100b29bf7fb10e2f91b4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2350126Reviewed-by: Rakina Zata Amni <rakina@chromium.org>
Reviewed-by: Changwan Ryu <changwan@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#798881}