RateProfile::frame_num specifies frame at which this rate profile should be applied. Bug: none Change-Id: I003ee43f44299a49d83f547558284817bfaeacc0 Reviewed-on: https://webrtc-review.googlesource.com/c/115242 Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Reviewed-by: Seth Hampson <shampson@webrtc.org> Commit-Queue: Sergey Silkin <ssilkin@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26080}