Reland: Remember last known mouse position after same-site nav.
This relands crrev.com/1340838 which was reverted at crrev.com/1341030.
The reland updates a webdriver test to ignore mouse events.
Bug: 354649089,359566792
Change-Id: I9151733b69f456b25b0693a1571c7848684a19e5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5789855
Commit-Queue: Steve Kobes skobes@chromium.org
Reviewed-by: Dave Tapuska dtapuska@chromium.org
Cr-Commit-Position: refs/heads/main@{#1344238}