Remove unnecessary check from OOBE interrupt test.

We are checking if the update restarts after update and failing if it
does. As long as the update continues there is no need to fail this
test.

BUG=None
TEST=autoupdate_ForcedOOBEUpdate.interrupt

Change-Id: I7a10f979da037e1e3ddb110fd41603e1537a0f61
Reviewed-on: https://chromium-review.googlesource.com/1171829
Reviewed-by: David Haddock <dhaddock@chromium.org>
Commit-Queue: David Haddock <dhaddock@chromium.org>
Tested-by: David Haddock <dhaddock@chromium.org>
Trybot-Ready: David Haddock <dhaddock@chromium.org>
diff --git a/server/site_tests/autoupdate_ForcedOOBEUpdate/autoupdate_ForcedOOBEUpdate.py b/server/site_tests/autoupdate_ForcedOOBEUpdate/autoupdate_ForcedOOBEUpdate.py
index 7fd2597..3787c64 100644
--- a/server/site_tests/autoupdate_ForcedOOBEUpdate/autoupdate_ForcedOOBEUpdate.py
+++ b/server/site_tests/autoupdate_ForcedOOBEUpdate/autoupdate_ForcedOOBEUpdate.py
@@ -112,9 +112,8 @@
                                       'downloading before any more '
                                       'interruptions. Started interrupting '
                                       'at: %f' % progress)
-            if not self._update_continued_where_it_left_off(completed):
-                raise error.TestFail('The update did not continue where it '
-                                     'left off before rebooting.')
+            if self._is_update_engine_idle():
+                raise error.TestFail('The update was IDLE after reboot.')
 
             # Disconnect / Reconnect network.
             completed = self._get_update_progress()