[Telemetry] Introduce shared_user_story_state for real.

tools/perf/measurements/page_cycler_unittest.py

Index: tools/perf/measurements/page_cycler_unittest.py
diff --git a/tools/perf/measurements/page_cycler_unittest.py b/tools/perf/measurements/page_cycler_unittest.py
index 87eb669bb182207cd3b991841e91eeb2d3375f70..164e69f21ca19849cb9a05709be56dcd408231c6 100644
--- a/tools/perf/measurements/page_cycler_unittest.py
+++ b/tools/perf/measurements/page_cycler_unittest.py
@@ -5,9 +5,9 @@
 import unittest
 
 from telemetry.core import browser_options
-from telemetry.page import page_runner
 from telemetry.results import page_test_results
 from telemetry.unittest_util import simple_mock
+from telemetry.user_story import user_story_runner
 
 from measurements import page_cycler
 
@@ -106,11 +106,11 @@ class PageCyclerUnitTest(unittest.TestCase):
     options = browser_options.BrowserFinderOptions()
     options.browser_options.platform = FakePlatform()
     parser = options.CreateParser()
-    page_runner.AddCommandLineArgs(parser)
+    user_story_runner.AddCommandLineArgs(parser)
     args = ['--page-repeat=%i' % page_repeat,
             '--pageset-repeat=%i' % pageset_repeat]
     parser.parse_args(args)
-    page_runner.ProcessCommandLineArgs(parser, options)
+    user_story_runner.ProcessCommandLineArgs(parser, options)
     cycler.CustomizeBrowserOptions(options.browser_options)
 
     if setup_memory_module: