GitLab

[Documentation change] Add more tips to commit_checklist.md

Added a reminder to switch to the correct branch and to rebase any
changes from the upstream branch before resuming development work.

Bug: None
Change-Id: I7828562118825feab8b4a8d322f31bca17f77070
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2262119
Commit-Queue: Toby Huang <tobyhuang@chromium.org>
Reviewed-by: Aga Wronska <agawronska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#782617}