This CL makes three changes:
- moves the message scheduler into a new directory,
- splits the implementation into two files,
- and renames `MessageObject` to `ScheduledMessage`.
It does not make any semantic changes to the code.
The expectation is that we will need to make the message scheduler more
complex as part of improving the performance of the server, and that it
will be easier to do this if the code is structured differently.
Change-Id: I3f8741cadceb34c69fd45c1bf21f331d15824565
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/420500
Reviewed-by: Phil Quitslund <pquitslund@google.com>
Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>
Brian Wilkerson
5b7fb2e8e8