Rename roll_deps to roll_chromium_deps To emphasize that this script rolls pinned Chromium revision, in addition to other Chromium sub-repos. Bug: chromium:1104516 Change-Id: Idfd80af6f450b8eab255eaa0445f07742400d907 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2339547 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>