chameleon: Fix the configuration where there is no audio board
Only construct an AudioBoard when there is an audio board on Chameleon.
BUG=chromium:479376
TEST=run display_ClientChameleonConnection test without audio board
Change-Id: I20c8d1c52b537422852e5f372acc3914e9ea4b28
Reviewed-on: https://chromium-review.googlesource.com/266792
Reviewed-by: Hung-ying Tyan <tyanh@chromium.org>
Tested-by: Cheng-Yi Chiang <cychiang@chromium.org>
Commit-Queue: Cheng-Yi Chiang <cychiang@chromium.org>
1 file changed