Encapsulate logic for reading .y4m video files in a single class. We
currently have spread out logic for opening .y4m files with partial
parsing. This CL consolidates this logic into a single class with a well
defined interface.
Change-Id: Id61673b3c95a0053b30e95b4cf382e1c6b05fc30
Bug: webrtc:9642
Reviewed-on: https://webrtc-review.googlesource.com/94772
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Reviewed-by: Paulina Hensman <phensman@webrtc.org>
Commit-Queue: Magnus Jedvert <magjed@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24398}