[Telemetry] Introduce shared_user_story_state for real.

tools/perf/profile_creators/extensions_profile_creator.py

 # Copyright 2014 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 json
 import logging
 import os
 import platform
 import shutil
 import socket
@@ skipping 188 matching lines @@
 
   def CanRunForPage(self, page):
     # No matter how many pages in the pageset, just perform two test iterations.
     return page.page_set.pages.index(page) < 2
 
   def ValidateAndMeasurePage(self, _, tab, results):
     # Profile setup works in 2 phases:
     # Phase 1: When the first page is loaded: we wait for a timeout to allow
     #     all extensions to install and to prime safe browsing and other
     #     caches.  Extensions may open tabs as part of the install process.
-    # Phase 2: When the second page loads, page_runner closes all tabs -
+    # Phase 2: When the second page loads, user_story_runner closes all tabs -
     #     we are left with one open tab, wait for that to finish loading.
 
     # Sleep for a bit to allow safe browsing and other data to load +
     # extensions to install.
     if not self._extensions_installed:
       sleep_seconds = 5 * 60
       logging.info("Sleeping for %d seconds." % sleep_seconds)
       time.sleep(sleep_seconds)
       self._extensions_installed = True
     else:
       # Phase 2: Wait for tab to finish loading.
       for i in xrange(len(tab.browser.tabs)):
         t = tab.browser.tabs[i]
         t.WaitForDocumentReadyStateToBeComplete()