[tools/perf] Reference legacy_page_test module instead of page_test

tools/perf/benchmarks/blink_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.
 
 import os
 
 from core import path_util
 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.page import shared_page_state
 from telemetry import story
 from telemetry.value import list_of_scalar_values
 
 from benchmarks import pywebsocket_server
 from page_sets import webgl_supported_shared_state
 
 
 BLINK_PERF_BASE_DIR = os.path.join(path_util.GetChromiumSrcDir(),
                                    'third_party', 'WebKit', 'PerformanceTests')
@@ skipping 41 matching lines @@
     _AddPage(path)
   ps = story.StorySet(base_dir=os.getcwd() + os.sep,
                       serving_dirs=serving_dirs)
   for url in page_urls:
     ps.AddStory(page_module.Page(
         url, ps, ps.base_dir,
         shared_page_state_class=shared_page_state_class))
   return ps
 
 
-class _BlinkPerfMeasurement(page_test.PageTest):
+class _BlinkPerfMeasurement(legacy_page_test.LegacyPageTest):
   """Tuns a blink performance test and reports the results."""
 
   def __init__(self):
     super(_BlinkPerfMeasurement, self).__init__()
     with open(os.path.join(os.path.dirname(__file__),
                            'blink_perf.js'), 'r') as f:
       self._blink_perf_js = f.read()
 
   def WillNavigateToPage(self, page, tab):
     page.script_to_evaluate_on_commit = self._blink_perf_js
@@ skipping 248 matching lines @@
 
   def CreateStorySet(self, options):
     path = os.path.join(BLINK_PERF_BASE_DIR, 'Pywebsocket')
     return CreateStorySetFromPath(
         path, SKIPPED_FILE,
         shared_page_state_class=_SharedPywebsocketPageState)
 
   @classmethod
   def ShouldDisable(cls, possible_browser):
     return cls.IsSvelte(possible_browser)  # http://crbug.com/551950