[telemetry] Move tab from RunState to PageState.

tools/perf/profile_creators/small_profile_creator.py

 # Copyright (c) 2013 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 os
 
 from telemetry.core import util
 from telemetry.page import page_set
 from telemetry.page import profile_creator
 
 class SmallProfileCreator(profile_creator.ProfileCreator):
   """
   Runs a browser through a series of operations to fill in a small test profile.
   """
 
   def __init__(self):
     super(SmallProfileCreator, self).__init__()
     typical_25 = os.path.join(util.GetBaseDir(), 'page_sets', 'typical_25.json')
     self._page_set = page_set.PageSet.FromFile(typical_25)
 
     # Open all links in the same tab save for the last _NUM_TABS links which
     # are each opened in a new tab.
     self._NUM_TABS = 5
 
-  def TabForPage(self, page, tab):
+  def TabForPage(self, page, browser):
     idx = page.page_set.pages.index(page)
     # The last _NUM_TABS pages open a new tab.
     if idx <= (len(page.page_set.pages) - self._NUM_TABS):
-      return tab
+      return browser.tabs[0]
     else:
-      return tab.browser.tabs.New()
+      return browser.tabs.New()
 
   def MeasurePage(self, _, tab, results):
     # Can't use WaitForDocumentReadyStateToBeComplete() here due to
     # crbug.com/280750 .
     tab.WaitForDocumentReadyStateToBeInteractiveOrBetter()