[tools/perf] Reference legacy_page_test module instead of page_test

tools/perf/measurements/timeline_controller.py

 # Copyright 2014 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.
 
-from telemetry.page import page_test
+from telemetry.page import legacy_page_test
 from telemetry.timeline.model import TimelineModel
 from telemetry.timeline import tracing_config
 from telemetry.value import trace
 from telemetry.web_perf import smooth_gesture_util
 from telemetry.web_perf import timeline_interaction_record as tir_module
 
 
 RUN_SMOOTH_ACTIONS = 'RunSmoothAllActions'
 
 
@@ skipping 60 matching lines @@
                 self.model, r))
 
     # If there is no other smooth records, we make measurements on time range
     # marked by timeline_controller itself.
     # TODO(nednguyen): when crbug.com/239179 is marked fixed, makes sure that
     # page sets are responsible for issueing the markers themselves.
     if len(self._smooth_records) == 0 and run_smooth_actions_record:
       self._smooth_records = [run_smooth_actions_record]
 
     if len(self._smooth_records) == 0:
-      raise page_test.Failure('No interaction record was created.')
+      raise legacy_page_test.Failure('No interaction record was created.')
 
   def CleanUp(self, platform):
     if platform.tracing_controller.is_tracing_running:
       platform.tracing_controller.StopTracing()
 
   @property
   def model(self):
     return self._model
 
   @property
   def renderer_process(self):
     return self._renderer_process
 
   @property
   def smooth_records(self):
     return self._smooth_records