Revert r8476 "Set decoder output frequency in AudioDecoder::Decode call"

This change uncovered issue 4143, evading the Memcheck suppression
since the signature is changed in the Decode function.

A fix for this is in the making; see
https://review.webrtc.org/36309004. This CL will be re-landed once the
fix is in place.

BUG=4143
TBR=kwiberg@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/42089004

Cr-Commit-Position: refs/heads/master@{#8488}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8488 4adac7df-926f-26a2-2b94-8c16560cd09d
20 files changed