GitLab

The userAgent strings associated with some emulated mobile devices
contain substring "%s", which should be replaced with Chrome version.

Bug: chromedriver:1883
Change-Id: I475a9a20e72008956bc201b3677cb60f6632e57c
Reviewed-on: https://chromium-review.googlesource.com/689966
Commit-Queue: John Chen <johnchen@chromium.org>
Reviewed-by: Shuotao Gao <stgao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#506775}