This allows offline visualization of the different TL. For now, there is no need to do the same for the decoded frames. Bug: webrtc:10349 Tested: 1) ninja -C out/Debug; and out/Debug/modules_tests --gtest_filter="*MultiresVP8*:*SvcVP9*". 2) Downstream tests. Change-Id: Iaf5ab19ee681488706d8777a5adba78efd5cc1ee Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/128861 Commit-Queue: Rasmus Brandt <brandtr@webrtc.org> Reviewed-by: Mirta Dvornicic <mirtad@webrtc.org> Cr-Commit-Position: refs/heads/master@{#27240}