Delete trace-info.json.

tools/perf/measurements/smoothness_controller.py

Index: tools/perf/measurements/smoothness_controller.py
diff --git a/tools/perf/measurements/smoothness_controller.py b/tools/perf/measurements/smoothness_controller.py
index 6e8dcd9acead0a809ee674bad59ede024a9cec59..b29a1edda5c75953925564a8640737a20515c65e 100644
--- a/tools/perf/measurements/smoothness_controller.py
+++ b/tools/perf/measurements/smoothness_controller.py
@@ -15,6 +15,12 @@ from telemetry.web_perf.metrics import smoothness
 
 RUN_SMOOTH_ACTIONS = 'RunSmoothAllActions'
 
+# Descriptions for results from platform.GetRawDisplayFrameRateMeasurements().
+DESCRIPTIONS = {
+    'avg_surface_fps': 'Average frames per second as measured by the '
+                       'platform\'s SurfaceFlinger.'
+}
+
 
 class MissingDisplayFrameRateError(page_measurement.MeasurementFailure):
   def __init__(self, name):
@@ -90,7 +96,7 @@ class SmoothnessController(object):
         smooth_records = [run_smooth_actions_record]
 
     # Create an interaction_record for this legacy measurement. Since we don't
-    # wrap the results that is sent to smoothnes metric, the label will
+    # wrap the results that are sent to smoothness metric, the label will
     # not be used.
     smoothness_metric = smoothness.SmoothnessMetric()
     smoothness_metric.AddResults(
@@ -101,10 +107,12 @@ class SmoothnessController(object):
           raise MissingDisplayFrameRateError(r.name)
         if isinstance(r.value, list):
           results.AddValue(list_of_scalar_values.ListOfScalarValues(
-              results.current_page, r.name, r.unit, r.value))
+              results.current_page, r.name, r.unit, r.value,
+              description=DESCRIPTIONS.get(r.name)))
         else:
           results.AddValue(scalar.ScalarValue(
-              results.current_page, r.name, r.unit, r.value))
+              results.current_page, r.name, r.unit, r.value,
+              description=DESCRIPTIONS.get(r.name)))
 
   def CleanUp(self, tab):
     if tab.browser.platform.IsRawDisplayFrameRateSupported():