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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: 714018
Change-Id: I794495614c086cef21f5c9fd75fa8599bf04e1da
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2087212
Commit-Queue: Jose Lopes <jabolopes@google.com>
Reviewed-by: Yuri Wiitala <miu@chromium.org>
Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
Reviewed-by: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#747609}