Use clients' preferred buffer size when the sample rates match and it is a number smaller than 2047.

BUG=152780
TEST=apprtc.appspot.com/?debug=loopback, no choppy audio

Review URL: https://chromiumcodereview.appspot.com/11014015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@159666 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed