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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


Bug: 1007794
Change-Id: I6ce90efd8b8e29514c58e866316e84e487c324d9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2500442Reviewed-by: David Roger <droger@chromium.org>
Commit-Queue: Renjie Tang <renjietang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#821299}