GitLab

1) Need to change the way python launched Edge. This is the only way an URL
can be passed to Edge that contains "&".

2) Add an option to pass command line switches in a file

BUG=867155
R=sunnyps@chromium.org
TEST=manual

Change-Id: If5457a82661414c2a3453bff094d6a2ffadeeab0
Reviewed-on: https://chromium-review.googlesource.com/c/1332930
Commit-Queue: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Sunny Sachanandani <sunnyps@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609054}