GitLab

As ash/wm/common is going to use the rest of ash it doesn't make sense
to have a separate component.

BUG=none
TEST=covered by tests
R=jamescook@chromium.org
TBR=reveman@chromium.org,kelvinp@chromium.org

Review-Url: https://codereview.chromium.org/2018753003
Cr-Commit-Position: refs/heads/master@{#396577}