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This is a reland of f4723a7e

Original change's description:
> Convert from base::Bind and base::Callback to Once/Repeating in media
> 
> This CL converts base::Callback (and corresponding calls to base::Bind)
> to either base::OnceCallback or base::RepeatingCallback in
> chrome/browser/media. In general a base::OnceCallback is preferred since
> that's a stronger API guarantee, so that's been done where safe.
> 
> Bug: 1007635
> Change-Id: Ie3113c61db1ae43ce2e31c262f023d714f42dfc0
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2321003
> Commit-Queue: Will Cassella <cassew@google.com>
> Reviewed-by: Frank Liberato <liberato@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#792380}

Bug: 1007635
Change-Id: Idf5e4e9b24bf8e09f0d81cc9b822c267c479f9f0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2324409Reviewed-by: Frank Liberato <liberato@chromium.org>
Commit-Queue: Will Cassella <cassew@google.com>
Cr-Commit-Position: refs/heads/master@{#792490}