Update reference to page_test module to use legacy_page_test module

content/test/gpu/gpu_tests/gpu_test_base.py

 # Copyright 2015 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 logging
 
 from telemetry import benchmark as benchmark_module
 from telemetry.page 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 as shared_page_state_module
 from telemetry.testing import fakes
 
 from gpu_tests import exception_formatter
 from gpu_tests import gpu_test_expectations
 
 class TestBase(benchmark_module.Benchmark):
   """Base classes for all GPU tests in this directory. Implements
   support for per-page test expectations."""
 
@@ skipping 14 matching lines @@
     # By default, creates an empty GpuTestExpectations object. Override
     # this in subclasses to set up test-specific expectations. Must
     # return an instance of GpuTestExpectations or a subclass.
     #
     # Do not call this directly. Call GetExpectations where necessary.
     return gpu_test_expectations.GpuTestExpectations()
 
 
 # Provides a single subclass of PageTest in case it's useful in the
 # future.
-class ValidatorBase(page_test.PageTest):
+class ValidatorBase(legacy_page_test.LegacyPageTest):
   def __init__(self,
                needs_browser_restart_after_each_page=False,
                clear_cache_before_each_run=False):
     super(ValidatorBase, self).__init__(
       needs_browser_restart_after_each_page=\
         needs_browser_restart_after_each_page,
       clear_cache_before_each_run=clear_cache_before_each_run)
 
   def ValidateAndMeasurePage(self, page, tab, result):
     pass
@@ skipping 101 matching lines @@
 
 
     # TODO(kbr): this is fragile -- if someone changes the
     # shared_page_state_class to something that doesn't handle skip
     # expectations, then they'll hit the exception in
     # RunStoryWithRetries, above. Need to rethink.
     self._expectations = expectations
 
   def GetExpectations(self):
     return self._expectations