tree 2b55635d3a374fcb60c6c6a76c1e4ea15bf0d83d
parent 37fab15a4e7e9e6cdeffd33bd9b6c03c6d118361
author Jeff Brown <jeffbrown@google.com> 1528406612 -0700
committer Jeff Brown <jeffbrown@google.com> 1528412852 +0000

[fit][build] Add cpp_legacy_callbacks flag.

Initially, the default is true (opt-out behavior).
Later we will change this default to false (opt-in behavior).
Then once the migration is complete, we will delete the flag altogether.

Change-Id: Ifeafc2de3ece25a099fbfebb58e930a6ce9f9e29