Attempt to update the README.chromium file with the new submodule
revision after rolling it in a DEPS update. This update is flag-guarded
and will only run when explicitly specified.
Currently, only README.chromium files with a single "Revision:" line are
supported. Multiple lines and files with the divider are not handled.
These are left as future TODOs.
Bug: 390067679
Change-Id: Ib776564ae94360cc72dd633fc7ed7b3f84b5b9d2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/6173767
Reviewed-by: Gavin Mak <gavinmak@google.com>
Commit-Queue: Jordan Brown <rop@google.com>
Reviewed-by: Jiewei Qian <qjw@chromium.org>