base: Cleanup callback types (part 2).

Remove some usage of deprecated callback types in base/*. Where possible
convert to the corresponding once type, otherwise replace with the
repeating type.

Bug: 714018
Change-Id: Idb7bf334fb06a407bf65e4ffb4cc2e19dd8a5195
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1572809
Commit-Queue: kylechar <kylechar@chromium.org>
Reviewed-by: Fran├žois Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653580}
31 files changed