Remove no longer needed callback adapter around PostTask and OnceCallback

This CL removes obsolete base::OnceCallback adapters, that was needed
before PostTask got OnceCallback support.

Change-Id: I5148111286a08b92c53eda64bbff59aa4d33312d
Reviewed-on: https://chromium-review.googlesource.com/785430
Reviewed-by: Alexander Timin <altimin@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Commit-Queue: Taiju Tsuiki <tzik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#518871}

CrOS-Libchrome-Original-Commit: a04faf6bb60e2e6829848a0bafa9f515c9499b99
1 file changed
tree: 93ca5c5006f6675a56e2aeb3724a277b1b38dd63
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/