Next step is to replace VideoLayerFrameId with int64_t. Bug: webrtc:12206 Change-Id: I414f491e383acf7f8efd97f7bf93dc55a5194fbf Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/206804 Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Reviewed-by: Sam Zackrisson <saza@webrtc.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Commit-Queue: Philip Eliasson <philipel@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33245}