[ChromeDriver] Temporarily disable touch emulation

Bug https://crbug.com/chromedriver/2144 is causing ChromeDriver and
Chrome to stop responding under some scenarios. Temporarily disabling
touch emulation feature until this bug can be resolve.

Bug: chromedriver:2144
Change-Id: I216235aa909aafa5cb44e7519c89056e2caee29d
Reviewed-on: https://chromium-review.googlesource.com/857882
Reviewed-by: Caleb Rouleau <crouleau@chromium.org>
Commit-Queue: John Chen <johnchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#528070}
2 files changed