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This is part of the base::Callback migration.

Context: https://cs.chromium.org/chromium/src/docs/callback.md?rcl=9fcc3764aea8f97e9f6de4a9ee61d554e67edcda&l=40
Change-Id: I7bc713213889d35e0868821a41c0ea9c8e0c16d1
Bug: 714018
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2030953Reviewed-by: danakj <danakj@chromium.org>
Reviewed-by: Min Qin <qinmin@chromium.org>
Commit-Queue: Jose Lopes <jabolopes@google.com>
Auto-Submit: Jose Lopes <jabolopes@google.com>
Cr-Commit-Position: refs/heads/master@{#738233}