GitLab

Modify ChromeDriver so it doesn't force closing client HTTP connection
if request header has connection:keep-alive.

Bug: chromedriver:2183
Change-Id: I965fe3e25c7d9cee8050ed90933acbfb0e70a5d7
Reviewed-on: https://chromium-review.googlesource.com/844355Reviewed-by: Jonathon Kereliuk <kereliuk@chromium.org>
Commit-Queue: John Chen <johnchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#527006}