GitLab

Supports stopping the old bindings generation of IDL callback
functions so that we can enable the new bindings generator.

Bug: 839389
Change-Id: Ic84f8b6630d2f77983e551083a93c2de3423f954
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2434184Reviewed-by: Hitoshi Yoshida <peria@chromium.org>
Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811161}