Convert smoothness to the new timeline based metric API.

tools/perf/metrics/timeline_interaction_record_unittest.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 unittest
 
 from metrics import timeline_interaction_record
 from telemetry.core.timeline import async_slice
 
 
 class ParseTests(unittest.TestCase):
   def testParse(self):
     self.assertTrue(timeline_interaction_record.IsTimelineInteractionRecord(
         'Interaction.Foo'))
     self.assertTrue(timeline_interaction_record.IsTimelineInteractionRecord(
         'Interaction.Foo/Bar'))
     self.assertFalse(timeline_interaction_record.IsTimelineInteractionRecord(
         'SomethingRandom'))
 
   def CreateRecord(self, event_name):
     s = async_slice.AsyncSlice(
       'cat', event_name,
       timestamp=1, duration=2)
-    return timeline_interaction_record.TimelineInteractionRecord(s)
+    return timeline_interaction_record.TimelineInteractionRecord.FromEvent(s)
 
   def testCreate(self):
     r = self.CreateRecord('Interaction.LogicalName')
     self.assertEquals('LogicalName', r.logical_name)
     self.assertEquals(False, r.is_smooth)
     self.assertEquals(False, r.is_loading_resources)
 
     r = self.CreateRecord('Interaction.LogicalName/is_smooth')
     self.assertEquals('LogicalName', r.logical_name)
     self.assertEquals(True, r.is_smooth)
     self.assertEquals(False, r.is_loading_resources)
 
     r = self.CreateRecord('Interaction.LogicalNameWith/Slash/is_smooth')
     self.assertEquals('LogicalNameWith/Slash', r.logical_name)
     self.assertEquals(True, r.is_smooth)
     self.assertEquals(False, r.is_loading_resources)
 
     r = self.CreateRecord(
         'Interaction.LogicalNameWith/Slash/is_smooth,is_loading_resources')
     self.assertEquals('LogicalNameWith/Slash', r.logical_name)
     self.assertEquals(True, r.is_smooth)
     self.assertEquals(True, r.is_loading_resources)