Reverted the logic introduced in https://codereview.webrtc.org/2933953003 This is because the audio device buffer behavior changed with https://codereview.webrtc.org/3009193002, and the RequestPlayoutData method now returns number of samples in each channel, which creates mismatch the reverted CL. Bug: webrtc:8548 Change-Id: Id4711ca48437ddd3483327c2a4c7827d09e5b770 Reviewed-on: https://webrtc-review.googlesource.com/24122 Reviewed-by: Niklas Enbom <niklas.enbom@webrtc.org> Commit-Queue: Lu Liu <lliuu@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20737}