Update speed setting in VP9.

TBR=stefan@webrtc.org
BUG=

Review URL: https://webrtc-codereview.appspot.com/44919004

Cr-Original-Commit-Position: refs/heads/master@{#8870}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: b8cfa6832356827996868df839157d6f80cac92f
2 files changed