[tools/perf] Reference legacy_page_test module instead of page_test

tools/perf/benchmarks/kraken.py

 # Copyright 2012 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 Mozilla's Kraken JavaScript benchmark."""
 
 import os
 
 from core import perf_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 list_of_scalar_values
 from telemetry.value import scalar
 
 from metrics import power
 
 
 DESCRIPTIONS = {
     'ai-astar':
         'This benchmark uses the [A* search algorithm]'
@@ skipping 39 matching lines @@
         'This benchmark serializes [Tinderbox]'
         '(http://tests.themasta.com/tinderboxpushlog/?tree=Firefox) build '
         'data to [JSON](http://www.json.org).',
 }
 
 
 def _Mean(l):
   return float(sum(l)) / len(l) if len(l) > 0 else 0.0
 
 
-class _KrakenMeasurement(page_test.PageTest):
+class _KrakenMeasurement(legacy_page_test.LegacyPageTest):
 
   def __init__(self):
     super(_KrakenMeasurement, 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 45 matching lines @@
 
   def CreateStorySet(self, options):
     ps = story.StorySet(
         archive_data_file='../page_sets/data/kraken.json',
         base_dir=os.path.dirname(os.path.abspath(__file__)),
         cloud_storage_bucket=story.PARTNER_BUCKET)
     ps.AddStory(page_module.Page(
         'http://krakenbenchmark.mozilla.org/kraken-1.1/driver.html',
         ps, ps.base_dir))
     return ps