Synthetic pinch gesture take scale factor as parameter.

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.
 # pylint: disable=W0401,W0614
 from telemetry.page.actions.all_page_actions import *
 from telemetry.page import page as page_module
 from telemetry.page import page_set as page_set_module
 
 
 class ToughPinchZoomCasesPage(page_module.Page):
@@ skipping 60 matching lines @@
     self.credentials = 'google'
 
   def RunNavigateSteps(self, action_runner):
     action_runner.RunAction(NavigateAction())
     action_runner.RunAction(WaitAction({'seconds':2}))
 
   def RunSmoothness(self, action_runner):
     action_runner.RunAction(PinchAction(
       {
         'left_anchor_percentage': 0.1,
-        'top_anchor_percentage': 0.1
+        'top_anchor_percentage': 0.3
       }))
 
 
 class GoogleImageSearchPage(ToughPinchZoomCasesPage):
 
   """ Why: tough image case; top google properties """
 
   def __init__(self, page_set):
     super(GoogleImageSearchPage, self).__init__(
       url='https://www.google.com/search?q=cats&tbm=isch',
@@ skipping 19 matching lines @@
       {
         'text': 'Home',
         'condition': 'element'
       }))
 
   def RunSmoothness(self, action_runner):
     action_runner.RunAction(PinchAction(
       {
         'element_function': '''
           function(callback) {
-            callback(document.getElementsByClassName("Ct")[0])
+            callback(document.getElementById("110031535020051778989-tab-bar"))
           }'''
       }))
 
 
 class YoutubePage(ToughPinchZoomCasesPage):
 
   """ Why: #3 (Alexa global) """
 
   def __init__(self, page_set):
     super(YoutubePage, self).__init__(
@@ skipping 106 matching lines @@
 
   def __init__(self, page_set):
     super(YahooGamePage, self).__init__(
       url='http://games.yahoo.com',
       page_set=page_set)
 
   def RunNavigateSteps(self, action_runner):
     action_runner.RunAction(NavigateAction())
     action_runner.RunAction(WaitAction({'seconds':2}))
 
+
+class YahooAnswersPage(ToughPinchZoomCasesPage):
+
+  """ 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):
+    action_runner.RunAction(PinchAction(
+      {
+        'element_function': '''
+          function(callback) {
+            callback(document.getElementById("ya-content-apps"))
+          }'''
+      }))
+
+
 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',
       user_agent_type='desktop',
       archive_data_file='data/tough_pinch_zoom_cases.json')
 
@@ skipping 23 matching lines @@
     self.AddPage(ToughPinchZoomCasesPage('http://www.amazon.com', self))
 
     # Why: #1 commerce website by time spent by users in US
     self.AddPage(ToughPinchZoomCasesPage('http://www.ebay.com', self))
 
     self.AddPage(YahooGamePage(self))
 
     # Why: #1 Alexa recreation
     self.AddPage(ToughPinchZoomCasesPage('http://booking.com', self))
 
-    # Why: #1 Alexa reference
-    self.AddPage(ToughPinchZoomCasesPage('http://answers.yahoo.com', self))
+    self.AddPage(YahooAnswersPage(self))
 
     # Why: #1 Alexa sports
     self.AddPage(ToughPinchZoomCasesPage('http://sports.yahoo.com/', self))