Add vda_flag to open chrome

This flag is used in session_manager_setup.sh as well.

BUG=chrome-os-partner:17128
TEST=start factory

Change-Id: I1076f12e3e56c311c33cb51e6b9937f626ea9b37
Reviewed-on: https://gerrit.chromium.org/gerrit/50266
Reviewed-by: Ricky Liang <jcliang@chromium.org>
Commit-Queue: Cheng-Yi Chiang <cychiang@chromium.org>
Tested-by: Cheng-Yi Chiang <cychiang@chromium.org>
1 file changed