BindOnce refactoring: explicitly use BindRepeating in browser.cc

PrefChangeRegistrar::NamedChangeCallback is explicitly defined as a
RepeatingCallback, so use BindRepeating in callers.

BUG=714018

Change-Id: I4e655bc8586f00a860e7205f5aa3818ae3a71a22
Reviewed-on: https://chromium-review.googlesource.com/1003115
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#549329}
1 file changed