Make DEPS file compatible with Chromium. Rename 'root' to 'angle_root' and add conditions to not sync dependencies when building with Chromium. Bug: 782846 Change-Id: I250609ad0b5b8cad606075baf6dd6ca4e968a5b6 Reviewed-on: https://chromium-review.googlesource.com/1082922 Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>