Temporarily disable EVDA for Snow until related bugs are fixed.
Temporarily disable EVDA for Snow until related bugs are fixed.

BUG=chromium:173201
TEST=manual

Change-Id: I504911d7713e270e7c17e51fa0fb5a6ae692d9ef
Reviewed-on: https://gerrit.chromium.org/gerrit/43562
Reviewed-by: John Sheu <e133b36fa071c0f7efb4cebd35fa1371d3ae789d@chromium.org>
Commit-Queue: Pawel Osciak <aa548d69ba30e55e846e63696fa33cc8f1213310@chromium.org>
Tested-by: Pawel Osciak <aa548d69ba30e55e846e63696fa33cc8f1213310@chromium.org>

chadversary/chromiumos.platform.login_manager,chadversary/chromiumos.platform.login_manager,chadversary/chromiumos.platform.login_manager