doc/ContributingCode.md add more links needed at given context Change-Id: I331ac7b24fd35735a0822a6b86ece66e1847f475 Reviewed-on: https://chromium-review.googlesource.com/347130 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>