0b5b52d - Link pulse when building the rust pulse backend
c6366e4 - Add a rountrip latency testing mode to the tool
abbdaa2 - Allow going lower in latency.
c64d242 - Fix audio output latency measurement.
0f79915 - Reintroduce output channel limit (255) in validate_stream_params.
a89afa3 - cubeb_pulse: Fix -Wimplicit-int-conversion warnings.
41112ce - cubeb-test: Fix -Wimplicit-int-conversion warning and handle EOF correctly.
0d1d9d8 - Link pthread when building USE_PULSE.
0b5b52d, c6366e4, 0d1d9d8 are build system changes for the either the upstream build system, or a testing tool, that we don't use in Gecko.
abbdaa2 allows testing lower latency, but won't do anything without pref changes.
c64d242 will change what is reported by
AudioContext.outputLatency (so that it's correct), and might improve A/V sync (depending on the output device used).
a89afa3 and 41112ce are warning fixes.