Ryan Harrison a84ab48150 Add support for different default branches in roll-shader-deps
tint has moved to using origin/main, and shaderc is soon to migrate

Change-Id: I578e4df91330351e10513874b2ca2728e4227803
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/23320
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
2020-06-17 23:52:19 +00:00
..
2020-05-07 21:15:55 +00:00