*** Reason for rollback ***
CookieManager APIs are fundamentally broken (b/67951242)
*** Original change description ***
Cookie-based validation in CronetDataSource
Using cookie validation from streamer, streamer can enforce that only clients who have the cookie are able to stream the video.
***
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=173396251
