Fix -Wreorder compile error after https://codereview.webrtc.org/1189583002/

BUG=webrtc:4685, webrtc:4686
TBR=torbjorng@chromium.org,

Review URL: https://codereview.webrtc.org/1300683002 .

Cr-Commit-Position: refs/heads/master@{#9720}
1 file changed