Move smoothness to the new API

tools/perf/measurements/timeline_based_measurement.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.
 
 from metrics import timeline as timeline_module
 from metrics import timeline_interaction_record as tir_module
+from metrics import smoothness
 from telemetry.page import page_measurement
 from telemetry.core.timeline import model as model_module
 
 
-
 # TimelineBasedMeasurement considers all instrumentation as producing a single
 # timeline. But, depending on the amount of instrumentation that is enabled,
 # overhead increases. The user of the measurement must therefore chose between
 # a few levels of instrumentation.
 NO_OVERHEAD_LEVEL = 'no-overhead'
 MINIMAL_OVERHEAD_LEVEL = 'minimal-overhead'
 DEBUG_OVERHEAD_LEVEL = 'debug-overhead'
 
 ALL_OVERHEAD_LEVELS = [
   NO_OVERHEAD_LEVEL,
   MINIMAL_OVERHEAD_LEVEL,
   DEBUG_OVERHEAD_LEVEL
 ]
 
 
+class _ResultsWrapper(object):
+  def __init__(self, results, interaction_record):
+    self._results = results
+    self._interaction_record = interaction_record
+
+  def Add(self, trace_name, units, value, chart_name=None, data_type='default'):
+    trace_name = self._interaction_record.GetResultNameFor(trace_name)
+    self._results.Add(trace_name, units, value, chart_name, data_type)
+
+  def AddSummary(self, trace_name, units, value, chart_name=None,
+                  data_type='default'):
+    trace_name = self._interaction_record.GetResultNameFor(trace_name)
+    self._results.AddSummary(trace_name, units, value, chart_name, data_type)
+
+
 class _TimelineBasedMetrics(object):
   def __init__(self, model, renderer_thread):
     self._model = model
     self._renderer_thread = renderer_thread
 
   def FindTimelineInteractionRecords(self):
     # TODO(nduca): Add support for page-load interaction record.
-    return [tir_module.TimelineInteractionRecord(event) for
+    return [tir_module.TimelineInteractionRecord.FromEvent(event) for
             event in self._renderer_thread.IterAllAsyncSlices()
             if tir_module.IsTimelineInteractionRecord(event.name)]
 
   def CreateMetricsForTimelineInteractionRecord(self, interaction):
     res = []
     if interaction.is_smooth:
-      pass # TODO(nduca): res.append smoothness metric instance.
+      res.append(smoothness.SmoothnessMetric())
     return res
 
   def AddResults(self, results):
     interactions = self.FindTimelineInteractionRecords()
     if len(interactions) == 0:
       raise Exception('Expected at least one Interaction on the page')
     for interaction in interactions:
       metrics = self.CreateMetricsForTimelineInteractionRecord(interaction)
+      wrapped_results = _ResultsWrapper(results, interaction)
       for m in metrics:
         m.AddResults(self._model, self._renderer_thread,
-                     interaction, results)
+                     interaction, wrapped_results)
 
 
 class TimelineBasedMeasurement(page_measurement.PageMeasurement):
   """Collects multiple metrics pages based on their interaction records.
 
   A timeline measurement shifts the burden of what metrics to collect onto the
   page under test, or the pageset running that page. Instead of the measurement
   having a fixed set of values it collects about the page, the page being tested
   issues (via javascript) an Interaction record into the user timing API that
   describing what the page is doing at that time, as well as a standardized set
@@ skipping 38 matching lines @@
       categories = '*,disabled-by-default-cc.debug'
     tab.browser.StartTracing(categories)
 
   def MeasurePage(self, page, tab, results):
     """ Collect all possible metrics and added them to results. """
     trace_result = tab.browser.StopTracing()
     model = model_module.TimelineModel(trace_result)
     renderer_thread = model.GetRendererThreadFromTab(tab)
     meta_metrics = _TimelineBasedMetrics(model, renderer_thread)
     meta_metrics.AddResults(results)