send_monitoring_event: support for default event and gomastats

infra_libs/event_mon/config.py

Index: infra_libs/event_mon/config.py
diff --git a/infra_libs/event_mon/config.py b/infra_libs/event_mon/config.py
index ccdd6a445bfe6d3c7690d47a922e5ed9f0fd13fd..8dc7d9f004a7f9849582a6d9b85eed0cb1371a49 100644
--- a/infra_libs/event_mon/config.py
+++ b/infra_libs/event_mon/config.py
@@ -165,6 +165,15 @@ def setup_monitoring(run_type='dry',
                                       dry_run=dry_run)
 
 
+def get_default_event():
+  """Returns a copy of the default event."""
+
+  # We return a copy here to tell people not to modify the event directly.
+  ret = ChromeInfraEvent()
+  ret.CopyFrom(_cache['default_event'])
+  return ret
+
+
 def set_default_event(event):
   """Change the default ChromeInfraEvent used to compute all events.