GitLab

Added helper function GetModifiedUrlWithSettingId that returns
the modified url with settingId appended. Also added a testing
file for that function.

Change-Id: Ic140bc81c334b89b43a332b66251cfff199f5a6a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2283653
Commit-Queue: Daniel Classon <dclasson@google.com>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#786519}