GitLab

When a site is suspended, SuspendedTab is shown in place of the actual
contents of the page. Showing a SuspendedTab stops loading on the
associated tab. Logic for showing a SuspendedTab flows through
PageViewObserver, which already has the knowledge of which domains are
being navigated to and shown. The SuspendedTab will eagerly remove
itself on a new page load, which means every page load on a suspended
site will create a new SuspendedTab. The alternative ended up being much
more complex to code.

We don't actively reload a page when a
site is un-suspended, although this would be fairly easy to add in a
follow-up.


Bug: 902568
Change-Id: Ibc7099eafbab65f583d5989436c8831366a9b040
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1435623
Commit-Queue: Patrick Noland <pnoland@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#637935}