[ChromeDriver] Keep connection open unless explicit request to close it

Bug: chromedriver:1529
Change-Id: Iaec7478021e88750f4a36e1bbe439a93ae9de6be
Reviewed-on: https://chromium-review.googlesource.com/c/1427981
Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: Tatiana Buldina <buldina@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625032}
1 file changed