Update for image comparison tests

The initial checkin didn't have version control. This adds it.
A folder structure like <milestone>/<golden image> is now on Google Storage.

The Roboto font change broke everything so we need versioning.

This also adds a bigger timeout as the lab takes longer than my local testing.
This also adds a few fixes due to accessibility fixes in ChromeOS.


Change-Id: I33d994122bebe413344c8cb18d6341e3975a5747
Previous-Reviewed-on: https://chromium-review.googlesource.com/255751
(cherry picked from commit 2a0a1ff986fc4fe0e817e2ce5745b4997b5eac27)
Reviewed-on: https://chromium-review.googlesource.com/257702
Reviewed-by: Kris Rambish <krisr@chromium.org>
Tested-by: David Haddock <dhaddock@chromium.org>
Commit-Queue: David Haddock <dhaddock@chromium.org>
5 files changed