danilchap 5c4f24a141 Move implmentation specific constants out of rtp_header_extension.h
BUG=None

Review-Url: https://codereview.webrtc.org/2642783006
Cr-Commit-Position: refs/heads/master@{#16222}
2017-01-23 19:10:20 +00:00
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2016-11-16 19:11:38 +00:00