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This reverts commit 6e62467b as PS#1. Landing
these interface changes will unblock WebRTC for changing the codec factory
interfaces and allow us to do further work on supporting VP9 profile 2 HW
codec on Chromium side.

In PS#2, it makes the changes that will make sure we have a 1-to-2 mapping
between media::BASELINE to webrtc::CONSTRAINED_BASELINE and webrtc::BASELINE
profiles. This is a temporary workaround until https://crbug.com/345569 is
solved. We don't expect to hit the earlier regressions that caused this
to be reverted with this mapping.

Bug: 908945,webrtc:7925
Change-Id: I93e408f8bd0ff0987d3f4c374132433a9ccdc0c6
Reviewed-on: https://chromium-review.googlesource.com/c/1351108Reviewed-by: Magnus Jedvert <magjed@chromium.org>
Commit-Queue: Emircan Uysaler <emircan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#613121}