GitLab

Both RegisterRequestHandler and RegisterDefaultHandler expect
HandleRequestCallback which is RepeatingCallback.

Bug: 1007815
Change-Id: I4f7c9a970e6a1a767e3c21ccc65b5e98c027774a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2085313Reviewed-by: Matt Menke <mmenke@chromium.org>
Commit-Queue: Matt Menke <mmenke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#746834}