[Telemetry] Fix tough_pinch_zoom_cases after r282218.

tools/perf/page_sets/tough_pinch_zoom_cases.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.
 from telemetry.page import page as page_module
 from telemetry.page import page_set as page_set_module
 
 
 class ToughPinchZoomCasesPage(page_module.Page):
 
   def __init__(self, url, page_set, name=''):
@@ skipping 87 matching lines @@
 
     self.credentials = 'google'
 
   def RunNavigateSteps(self, action_runner):
     action_runner.NavigateToPage(self)
     action_runner.WaitForElement(text='Home')
 
   def RunSmoothness(self, action_runner):
     interaction = action_runner.BeginGestureInteraction(
         'PinchAction', is_smooth=True)
-    action_runner.PinchElement(selector='110031535020051778989-tab-bar')
+    action_runner.PinchElement(selector='#110031535020051778989-tab-bar')
     interaction.End()
 
 
 class YoutubePage(ToughPinchZoomCasesPage):
 
   """ Why: #3 (Alexa global) """
 
   def __init__(self, page_set):
     super(YoutubePage, self).__init__(
       url='http://www.youtube.com',
@@ skipping 110 matching lines @@
   """ Why: #1 Alexa reference """
 
   def __init__(self, page_set):
     super(YahooAnswersPage, self).__init__(
       url='http://answers.yahoo.com',
       page_set=page_set)
 
   def RunSmoothness(self, action_runner):
     interaction = action_runner.BeginGestureInteraction(
         'PinchAction', is_smooth=True)
-    action_runner.PinchElement(selector='ya-content-apps')
+    action_runner.PinchElement(selector='#ya-content-apps')
     interaction.End()
 
 
 class ToughPinchZoomCasesPageSet(page_set_module.PageSet):
 
   """ Set of pages that are tricky to pinch-zoom """
 
   def __init__(self):
     super(ToughPinchZoomCasesPageSet, self).__init__(
       credentials_path='data/credentials.json',
@@ skipping 31 matching lines @@
 
     self.AddPage(YahooGamePage(self))
 
     # Why: #1 Alexa recreation
     self.AddPage(ToughPinchZoomCasesPage('http://booking.com', self))
 
     self.AddPage(YahooAnswersPage(self))
 
     # Why: #1 Alexa sports
     self.AddPage(ToughPinchZoomCasesPage('http://sports.yahoo.com/', self))