[tools/perf] Reference legacy_page_test module instead of page_test

tools/perf/benchmarks/indexeddb_perf.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.
 
 """Runs Chromium's IndexedDB performance test. These test:
 
 Databases:
   create/delete
 Keys:
   create/delete
 Indexes:
   create/delete
 Data access:
   Random read/write
   Read cache
 Cursors:
   Read & random writes
   Walking multiple
   Seeking.
 """
 
 import json
 import os
 
 from core import path_util
 from core import perf_benchmark
 
 from telemetry import page as page_module
 from telemetry import story
-from telemetry.page import page_test
+from telemetry.page import legacy_page_test
 from telemetry.value import scalar
 
 from metrics import memory
 from metrics import power
 
 import page_sets
 
 from telemetry.timeline import tracing_category_filter
 from telemetry.web_perf import timeline_based_measurement
 
 
 IDB_CATEGORY = 'IndexedDB'
 TIMELINE_REQUIRED_CATEGORY = 'blink.console'
 
 
-class _IndexedDbMeasurement(page_test.PageTest):
+class _IndexedDbMeasurement(legacy_page_test.LegacyPageTest):
 
   def __init__(self):
     super(_IndexedDbMeasurement, self).__init__()
     self._memory_metric = None
     self._power_metric = None
 
   def WillStartBrowser(self, platform):
     """Initialize metrics once right before the browser has been launched."""
     self._power_metric = power.PowerMetric(platform)
 
@@ skipping 72 matching lines @@
     return timeline_based_measurement.Options(
         overhead_level=cat_filter)
 
   @classmethod
   def Name(cls):
     return 'storage.indexeddb_endure_tracing'
 
   @classmethod
   def ValueCanBeAddedPredicate(cls, value, is_first_result):
     return 'idb' in value.name