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This callback is called from a while loop. It's run in:
* https://cs.chromium.org/chromium/src/media/formats/mp2t/es_parser_adts.cc?rcl=d027bf21fe41b297e9b0c6ed87b17973b7bb8f8d&l=179
which is called from:
* https://cs.chromium.org/chromium/src/media/formats/mp2t/es_parser_adts.cc?rcl=d027bf21fe41b297e9b0c6ed87b17973b7bb8f8d&l=297

Another example. It's run in:
* https://cs.chromium.org/chromium/src/media/formats/mp2t/es_parser_mpeg1audio.cc?rcl=d027bf21fe41b297e9b0c6ed87b17973b7bb8f8d&l=196
which is called from:
* https://cs.chromium.org/chromium/src/media/formats/mp2t/es_parser_adts.cc?rcl=d027bf21fe41b297e9b0c6ed87b17973b7bb8f8d&l=179

This is part of the base::Callback migration.

Context: https://cs.chromium.org/chromium/src/docs/callback.md?rcl=9fcc3764aea8f97e9f6de4a9ee61d554e67edcda&l=40

Bug: 1007806
Change-Id: Id10660797cf181121e0c34c581edd300fa3e23e5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2080268Reviewed-by: Albert J. Wong <ajwong@chromium.org>
Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
Commit-Queue: Jose Lopes <jabolopes@google.com>
Cr-Commit-Position: refs/heads/master@{#747156}