[sysmon] Fix typo

sysmon needs to be cleaned up to make it harder to introduce typos.

BUG=None
TEST=None

Change-Id: Ibf29e3770352a5c50b9b60164bd3f44202328482
Reviewed-on: https://chromium-review.googlesource.com/509902
Commit-Ready: Allen Li <ayatane@chromium.org>
Tested-by: Allen Li <ayatane@chromium.org>
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
diff --git a/scripts/sysmon/net_metrics.py b/scripts/sysmon/net_metrics.py
index 3a8c3b3..316089f 100644
--- a/scripts/sysmon/net_metrics.py
+++ b/scripts/sysmon/net_metrics.py
@@ -95,7 +95,7 @@
   _IOMetric(metric=_net_errors_metric,
             up_counter_name='errout',
             down_counter_name='errin'),
-  _IOMetric(metric=_net_drop_up_metric,
+  _IOMetric(metric=_net_dropped_metric,
             up_counter_name='dropout',
             down_counter_name='dropin'),
 )