Explicitly setting story names for thread_times benchmarks

tools/perf/page_sets/key_noop_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 telemetry.page import page as page_module
 from telemetry.page import shared_page_state
 from telemetry import story
 
 
 class NoOpPage(page_module.Page):
 
   def __init__(self, url, page_set):
     super(NoOpPage, self).__init__(
         url=url,
         page_set=page_set,
-        shared_page_state_class=shared_page_state.SharedMobilePageState)
+        shared_page_state_class=shared_page_state.SharedMobilePageState,
+        name=url.split('/')[-1])
 
   def RunNavigateSteps(self, action_runner):
     super(NoOpPage, self).RunNavigateSteps(action_runner)
     # Let load activity settle.
     action_runner.Wait(2)
 
   def RunPageInteractions(self, action_runner):
     # The default page interaction is simply waiting in an idle state.
     with action_runner.CreateInteraction('IdleWaiting'):
       action_runner.Wait(5)
 
 
 class NoOpTouchScrollPage(NoOpPage):
   def __init__(self, url, page_set):
     super(NoOpTouchScrollPage, self).__init__(url=url, page_set=page_set)
 
   def RunPageInteractions(self, action_runner):
     # The noop touch motion should last ~5 seconds.
     with action_runner.CreateGestureInteraction('ScrollAction'):
       action_runner.ScrollPage(direction='down', use_touch=True,
                                speed_in_pixels_per_second=300, distance=1500)
 
 
 class KeyNoOpCasesPageSet(story.StorySet):
 
   """ Key no-op cases """
 
   def __init__(self):
-    super(KeyNoOpCasesPageSet, self).__init__()
+    super(KeyNoOpCasesPageSet, self).__init__(verify_names=True)
 
     # Why: An infinite rAF loop which does not modify the page should incur
     # minimal activity.
     self.AddStory(NoOpPage('file://key_noop_cases/no_op_raf.html', self))
 
     # Why: An infinite setTimeout loop which does not modify the page should
     # incur minimal activity.
     self.AddStory(NoOpPage('file://key_noop_cases/no_op_settimeout.html', self))
 
     # Why: Scrolling an empty, unscrollable page should have no expensive side
     # effects, as overscroll is suppressed in such cases.
     self.AddStory(NoOpTouchScrollPage(
         'file://key_noop_cases/no_op_scroll.html', self))
 
     # Why: Feeding a stream of touch events to a no-op handler should be cheap.
     self.AddStory(NoOpTouchScrollPage(
         'file://key_noop_cases/no_op_touch_handler.html', self))