Reason for revert: Breaks downstream projects. Original issue's description: > Remove RTPPayloadStrategy and simplify RTPPayloadRegistry > > This CL removes RTPPayloadStrategy that is currently used to handle > audio/video specific aspects of payload handling. Instead, the audio and > video specific aspects will now have different functions, with linear > code flow. > > This CL does not contain any functional changes, and is just a > preparation for future CL:s. > > The main purpose with this CL is to add this function: > bool PayloadIsCompatible(const RtpUtility::Payload& payload, > const webrtc::VideoCodec& video_codec); > that can easily be extended in a future CL to look at video codec > specific information. > > BUG=webrtc:6743 > > Committed: https://crrev.com/b881254dc86d2cc80a52e08155433458be002166 > Cr-Commit-Position: refs/heads/master@{#15232} TBR=danilchap@webrtc.org,solenberg@webrtc.org,mflodman@webrtc.org # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=webrtc:6743 Review-Url: https://codereview.webrtc.org/2528993002 Cr-Commit-Position: refs/heads/master@{#15234}