Modify list_system_health_stories to generate_system_health_csv

tools/perf/list_system_health_stories

-#!/usr/bin/env python
-# 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.
-
-import sys
-
-from core import path_util
-sys.path.insert(1, path_util.GetTelemetryDir())  # To resolve telemetry imports
-
-import page_sets
-
-
-def IterAllSystemHealthStories():
-  for s in page_sets.SystemHealthStorySet(platform='desktop'):
-    yield s
-  for s in page_sets.SystemHealthStorySet(platform='mobile'):
-    if len(s.SUPPORTED_PLATFORMS) < 2:
-      yield s
-
-
-def main():
-  system_health_stories = list(IterAllSystemHealthStories())
-  system_health_stories.sort(key=lambda s: s.name)
-  print '{0:60} {1}'.format('Story name', 'Supported platform')
-  print '-' * 79
-  for s in system_health_stories:
-    p = s.SUPPORTED_PLATFORMS
-    if len(p) == 2:
-      p = 'all'
-    else:
-      p = list(p)[0]
-    print '{0:60} {1}'.format(s.name, p)
-  return 0
-
-
-if __name__ == '__main__':
-  sys.exit(main())