GitLab

Fix how pointer event locations are calculated in Perform Actions
command, in particular, fixing how relative pointer moves are handled.
This fixes all failures in WPT test perform_actions/pointer.py.

Bug: chromedriver:1897
Change-Id: If0bd79399e9376fe885ef9c26f20d775a4c7d6c3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1507313Reviewed-by: Lan Wei <lanwei@chromium.org>
Commit-Queue: John Chen <johnchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638744}