Delete trace-info.json.

tools/perf/measurements/smoothness_controller.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 import sys
 
 from measurements import smooth_gesture_util
 from telemetry.timeline.model import TimelineModel
 from telemetry.page import page_measurement
 from telemetry.page.actions import action_runner
 from telemetry.value import list_of_scalar_values
 from telemetry.value import scalar
 from telemetry.web_perf import timeline_interaction_record as tir_module
 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):
     super(MissingDisplayFrameRateError, self).__init__(
       'Missing display frame rate metrics: ' + name)
 
 class SmoothnessController(object):
   def __init__(self):
     self._timeline_model = None
     self._tracing_timeline_data = None
@@ skipping 55 matching lines @@
       if run_smooth_actions_record is None:
         sys.stderr.write('Raw tracing data:\n')
         sys.stderr.write(repr(self._tracing_timeline_data.EventData()))
         sys.stderr.write('\n')
         raise Exception('SmoothnessController failed to issue markers for the '
                         'whole interaction.')
       else:
         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(
       self._timeline_model, renderer_thread, smooth_records, results)
     if tab.browser.platform.IsRawDisplayFrameRateSupported():
       for r in tab.browser.platform.GetRawDisplayFrameRateMeasurements():
         if r.value is None:
           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():
       tab.browser.platform.StopRawDisplayFrameRateMeasurement()
     if tab.browser.is_tracing_running:
       tab.browser.StopTracing()