Disabled flaky system health smoke test.

tools/perf/benchmarks/system_health_smoke_test.py

 # Copyright 2016 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.
 
 """Run all system health stories used by system health benchmarks.
 
 Only memory benchmarks are used when running these stories to make the total
 cycle time manageable. Other system health benchmarks should be using the same
 stories as memory ones, only with fewer actions (no memory dumping).
 """
@@ skipping 56 matching lines @@
   # crbug.com/699966
   'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_desktop.multitab:misc:typical24', # pylint: disable=line-too-long
   # crbug.com/725923
   'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_desktop.load:social:facebook', # pylint: disable=line-too-long
   'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_desktop.load:media:flickr', # pylint: disable=line-too-long
   'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_desktop.load:social:tumblr', # pylint: disable=line-too-long
   'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_desktop.load:social:twitter', # pylint: disable=line-too-long
   'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_mobile.load:social:facebook', # pylint: disable=line-too-long
   'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_mobile.load:social:tumblr', # pylint: disable=line-too-long
   'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_mobile.load:social:pinterest', # pylint: disable=line-too-long
+  # crbug.com/725386
+  'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_desktop.browse:social:twitter', # pylint: disable=line-too-long
 })
 
 
 def _GenerateSmokeTestCase(benchmark_class, story_to_smoke_test):
 
   # NOTE TO SHERIFFS: DO NOT DISABLE THIS TEST.
   #
   # This smoke test dynamically tests all system health user stories. So
   # disabling it for one failing or flaky benchmark would disable a much
   # wider swath of coverage  than is usally intended. Instead, if a test is
@@ skipping 84 matching lines @@
     # Prefetch WPR archive needed by the stories set to avoid race condition
     # when feching them when tests are run in parallel.
     # See crbug.com/700426 for more details.
     stories_set.wpr_archive_info.DownloadArchivesIfNeeded()
 
     for story_to_smoke_test in stories_set.stories:
       suite.addTest(
           _GenerateSmokeTestCase(benchmark_class, story_to_smoke_test))
 
   return suite