Explicitly setting names for stories in unittests

tools/perf/measurements/v8_detached_context_age_in_gc_unittest.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.internal.results import page_test_results
 from telemetry.page import page as page_module
 from telemetry.testing import options_for_unittests
 from telemetry.testing import page_test_test_case
 from telemetry.util import wpr_modes
 
 from measurements import v8_detached_context_age_in_gc
 
 
 class FakePage(page_module.Page):
 
   def __init__(self, url):
-    super(FakePage, self).__init__(url=url)
+    super(FakePage, self).__init__(url=url, name=url)
 
   @property
   def is_file(self):
     return self._url.startswith('file://')
 
 
 class FakeTab(object):
 
   def __init__(self, histograms):
     self.histograms = histograms
@@ skipping 23 matching lines @@
 
 
 def _ActualValues(results):
   return dict((v.name, v) for v in results.all_page_specific_values)
 
 
 class SimplePage(page_module.Page):
 
   def __init__(self, page_set):
     super(SimplePage, self).__init__(
-        'file://host.html', page_set, page_set.base_dir)
+        'file://host.html', page_set, page_set.base_dir, name='host.html')
 
   def RunPageInteractions(self, action_runner):
     # Reload the page to detach the previous context.
     action_runner.ReloadPage()
 
 
 class V8DetachedContextAgeInGCTests(page_test_test_case.PageTestTestCase):
 
   def setUp(self):
     self._options = options_for_unittests.GetCopy()
@@ skipping 24 matching lines @@
   def testWithSimplePage(self):
     page_set = self.CreateEmptyPageSet()
     page = SimplePage(page_set)
     page_set.AddStory(page)
     metric = v8_detached_context_age_in_gc.V8DetachedContextAgeInGC()
     results = self.RunMeasurement(metric, page_set, options=self._options)
     self.assertEquals(0, len(results.failures), msg=str(results.failures))
     actual = _ActualValues(results)['V8_DetachedContextAgeInGC']
     self.assertLessEqual(0, actual.value)
     self.assertEqual('garbage_collections', actual.units)