faft: Static declaration of faft_delay_constants memebers

BUG=chromium-os:35902
TEST=Ran FAFT suite and passed.

Change-Id: I1dceb3fa7f6c88b50173b27d061a9aa3b0f975ec
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/36999
diff --git a/server/cros/faftsequence.py b/server/cros/faftsequence.py
index 525b36b..90a9c1b 100644
--- a/server/cros/faftsequence.py
+++ b/server/cros/faftsequence.py
@@ -1061,7 +1061,7 @@
         is_dev = self.checkers.crossystem_checker({'devsw_boot': '1'})
         if not is_dev:
             self.enable_dev_mode_and_reboot()
-        time.sleep(self.SYNC_DELAY)
+        time.sleep(self.delay.sync)
         self.enable_rec_mode_and_reboot()
         time.sleep(self.delay.install_shim_done)
         self.warm_reboot()