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This CL converts OutputProtection{Ptr, Request} in media and chrome
to the new Mojo type.

Bug: 955171
Change-Id: Ie7dfdb8fe46b2aec18a576eb6435122b662c1fd7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1882263Reviewed-by: Frank Liberato <liberato@chromium.org>
Reviewed-by: Ken Rockot <rockot@google.com>
Commit-Queue: Miyoung Shin <myid.shin@igalia.com>
Cr-Commit-Position: refs/heads/master@{#710128}