GitLab

Differentiate passing host for new session and
pass host instead of session id so that we can
use it to construct WebSocketUrl potentially

Bug: chromedriver:3588
Change-Id: Ib7a0dda3daf816b36ecf6220140dc906e2040487
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2391903Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: Shengfa Lin <shengfa@google.com>
Cr-Commit-Position: refs/heads/master@{#806369}