GitLab

This CL makes BackForwardCache navigation fire pageshow/pagehide events
to not only main frames, but also subframes.

Bug: 1021536
Change-Id: If021b240d288deff4acf20c4cbf333a7b79128f7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1900799
Commit-Queue: Yuzu Saijo <yuzus@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Alexander Timin <altimin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712981}