[tools/perf] Reference legacy_page_test module instead of page_test

tools/perf/benchmarks/oortonline.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 page_sets
 
 from core import perf_benchmark
 from telemetry import benchmark
-from telemetry.page import page_test
+from telemetry.page import legacy_page_test
 from telemetry.value import scalar
 from telemetry.value import improvement_direction
 from telemetry.timeline import tracing_category_filter
 from telemetry.web_perf import timeline_based_measurement
 from telemetry.web_perf.metrics import v8_gc_latency
 from telemetry.web_perf.metrics import smoothness
 from telemetry.web_perf.metrics import memory_timeline
 
 
-class _OortOnlineMeasurement(page_test.PageTest):
+class _OortOnlineMeasurement(legacy_page_test.LegacyPageTest):
 
   def __init__(self):
     super(_OortOnlineMeasurement, self).__init__()
 
   def ValidateAndMeasurePage(self, page, tab, results):
     tab.WaitForJavaScriptExpression('window.benchmarkFinished', 1000)
     scores = tab.EvaluateJavaScript('window.benchmarkScore')
     for score in scores:
       valid = score['valid']
       if valid:
@@ skipping 58 matching lines @@
   @classmethod
   def Name(cls):
     return 'oortonline_tbm'
 
   @classmethod
   def ValueCanBeAddedPredicate(cls, value, is_first_result):
     if value.tir_label in ['Begin', 'End']:
       return value.name.startswith('memory_') and 'v8_renderer' in value.name
     else:
       return value.tir_label == 'Running'