This reverts commit 4506382d.

We don't allow DEPS'ing things outside googlesource. This requires a
mirror. Also .gitignore entry is missing.

NOTRY=true
NOTREECHECKS=true
NOPRESUBMIT=true
TBR=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/2785183005
Cr-Commit-Position: refs/heads/master@{#44307}