Add WPT for PA navigation + window.fence.notifyEvent
Opening a new top-level page in a PA fenced frame requires user
activation, and notifyEvent does as well. This test ensures that
whichever of these occurs first consumes transient activation,
preventing the other.
Change-Id: I8d39797bd0abdf49e5c4c05e182c0132e67c8754
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5522343
Commit-Queue: Andrew Verge averge@chromium.org
Reviewed-by: Liam Brady lbrady@google.com
Cr-Commit-Position: refs/heads/main@{#1301317}