Updating references from story.display_name to story.name

tools/perf/page_sets/key_idle_power_cases.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.
 from page_sets import android_screen_restoration_shared_state
 
 from telemetry.page import page as page_module
 from telemetry.page import shared_page_state
 from telemetry import story
 
 
@@ skipping 32 matching lines @@
                shared_page_state_class=shared_page_state.SharedMobilePageState):
     # 90 seconds ensures the capture of activity after the 60-second
     # PowerMonitor suspend signal.
     super(KeyLongIdlePowerPage, self).__init__(
         url=url,
         page_set=page_set,
         turn_screen_off=turn_screen_off,
         duration_seconds=90,
         shared_page_state_class=(android_screen_restoration_shared_state
             .AndroidScreenRestorationSharedState))
-    self._name = self.display_name + " (Long Idle)"
+    self._name = self.name + " (Long Idle)"
 
 
 class KeyIdlePowerCasesPageSet(story.StorySet):
 
   """ Key idle power cases """
 
   def __init__(self):
     super(KeyIdlePowerCasesPageSet, self).__init__()
 
     foreground_urls_list = [
@@ skipping 19 matching lines @@
       self.AddStory(KeyIdlePowerPage(url, self, True))
 
     # Why: Ensure that activity strictly diminishes the longer the idle time.
     self.AddStory(KeyLongIdlePowerPage(
         'file://key_idle_power_cases/set-timeout.html', self, True))
 
 
 class KeyIdlePowerCasesStoryExpectations(story.expectations.StoryExpectations):
   def SetExpectations(self):
     pass