Fix 'unit' typo in media benchmark.

TBR=tonyg@chromium.org
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/334713002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@276757 0039d316-1c4b-4281-b951-d872f2087c98

tools/perf/benchmarks/media.py

@@ -18,13 +18,13 @@ class _MSEMeasurement(page_measurement.PageMeasurement):
       trace_name = '%s.%s' % (m, trace)
       if isinstance(metrics[m], list):
         results.AddValue(list_of_scalar_values.ListOfScalarValues(
-                results.current_page, trace_name, unit='ms',
+                results.current_page, trace_name, units='ms',
                 values=[float(v) for v in metrics[m]],
                 important=True))
 
       else:
         results.AddValue(scalar.ScalarValue(
-                results.current_page, trace_name, unit='ms',
+                results.current_page, trace_name, units='ms',
                 value=float(metrics[m]), important=True))