sysmon: Add proc metrics tests

BUG=chromium:736911
TEST=None

Change-Id: I8140d31ae6f28a02ad4fad32e5aed4f57f6231e4
Reviewed-on: https://chromium-review.googlesource.com/570943
Commit-Ready: Allen Li <ayatane@chromium.org>
Tested-by: Allen Li <ayatane@chromium.org>
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
diff --git a/scripts/sysmon/proc_metrics.py b/scripts/sysmon/proc_metrics.py
index 0e4bd88..08bf7c6 100644
--- a/scripts/sysmon/proc_metrics.py
+++ b/scripts/sysmon/proc_metrics.py
@@ -117,4 +117,5 @@
 
 def _is_sysmon(proc):
   """Return whether proc is a sysmon process."""
-  return proc.cmdline()[:3] == ['python', '-m', 'chromite.scripts.sysmon']
+  return (proc.cmdline()[0].endswith('python')
+          and proc.cmdline()[1:3] == ['-m', 'chromite.scripts.sysmon'])