[Telemetry refactor] Drop "2" from method calls to JS API

tools/perf/metrics/webrtc_stats_unittest.py

 # Copyright 2013 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 telemetry.testing import simple_mock
 
 from metrics import webrtc_stats
 
@@ skipping 95 matching lines @@
 
 
 class WebRtcStatsUnittest(unittest.TestCase):
 
   def _RunMetricOnJson(self, json_to_return, stats_metric):
     tab = simple_mock.MockObject()
     page = simple_mock.MockObject()
 
     stats_metric.Start(page, tab)
 
-    tab.ExpectCall('EvaluateJavaScript2',
+    tab.ExpectCall('EvaluateJavaScript',
                    simple_mock.DONT_CARE).WillReturn(json_to_return)
     stats_metric.Stop(page, tab)
 
     page.url = simple_mock.MockObject()
     results = FakeResults(page)
     stats_metric.AddResults(tab, results)
     return results
 
   def testExtractsValuesAsTimeSeries(self):
     stats_metric = webrtc_stats.WebRtcStatisticsMetric()
@@ skipping 42 matching lines @@
     expected_names = ['peer_connection_0_audio_goog_rtt',
                       'peer_connection_0_video_goog_rtt',
                       'peer_connection_1_video_goog_max_decode_ms',
                       'peer_connection_1_video_goog_rtt']
     self.assertEqual(expected_names, received_names)
 
   def testReturnsIfJsonIsEmpty(self):
     stats_metric = webrtc_stats.WebRtcStatisticsMetric()
     results = self._RunMetricOnJson('[]', stats_metric)
     self.assertFalse(results.received_values)