[tools/perf] Reference legacy_page_test module instead of page_test

tools/perf/benchmarks/dromaeo.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 math
 import os
 
 from core import perf_benchmark
 
 from telemetry import benchmark
 from telemetry import page as page_module
-from telemetry.page import page_test
+from telemetry.page import legacy_page_test
 from telemetry import story
 from telemetry.value import scalar
 
 from metrics import power
 
 
-class _DromaeoMeasurement(page_test.PageTest):
+class _DromaeoMeasurement(legacy_page_test.LegacyPageTest):
 
   def __init__(self):
     super(_DromaeoMeasurement, self).__init__()
     self._power_metric = None
 
   def CustomizeBrowserOptions(self, options):
     power.PowerMetric.CustomizeBrowserOptions(options)
 
   def WillStartBrowser(self, platform):
     self._power_metric = power.PowerMetric(platform)
@@ skipping 297 matching lines @@
   """Dromaeo CSS Query jquery JavaScript benchmark.
 
   Tests traversing a DOM structure using the Prototype JavaScript Library.
   """
   tag = 'cssqueryjquery'
   query_param = 'cssquery-jquery'
 
   @classmethod
   def Name(cls):
     return 'dromaeo.cssqueryjquery'