Fix latency plumbing in media::VirtualAudio[Input|Output]Stream.
Adds accounting for the buffer offsets introduced by the graph of
media::AudioConverters. Also, fixed the latency value being emitted by
VirtualAudioInputStream (should be zero, not the audio_bus duration).
This change, in combination with
https://codereview.chromium.org/759383003, results in
CastV2PerfomanceTest's av_sync metric becoming 0.359 ms (down from
24.7 ms).
Review URL: https://codereview.chromium.org/756733003
Cr-Commit-Position: refs/heads/master@{#306302}
2 files changed
