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The imported 3pp code has been cleaned and translated to C++.
Build targets will be added in a separate CL.

Bug: webrtc:9076
Change-Id: Ia53a042a842db734199271691c7b7c26e09b8ae0
Reviewed-on: https://chromium-review.googlesource.com/983557Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Ale Bzk <alessiob@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548115}