Rewrite broken Facebook test case in top_7_stress

tools/perf/page_sets/top_7_stress.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
 
 
 def _GetCurrentLocation(action_runner):
   return action_runner.EvaluateJavaScript('document.location.href')
 
 
 def _WaitForLocationChange(action_runner, old_href):
   action_runner.WaitForJavaScriptCondition(
       'document.location.href != "%s"' % old_href)
 
 
 class Top7StressPage(page_module.Page):
 
   def __init__(self, url, page_set, name=''):
     super(Top7StressPage, self).__init__(
         url=url, page_set=page_set, name=name,
         credentials_path = 'data/credentials.json')
     self.user_agent_type = 'desktop'
-    self.archive_data_file = 'data/top_25.json'
+    self.archive_data_file = 'data/top_7_stress.json'
 
   def RunPageInteractions(self, action_runner):
     raise NotImplementedError()
 
 
 class GoogleWebSearchPage(Top7StressPage):
 
   """ Why: top google property; a google tab is often open """
 
   def __init__(self, page_set):
@@ skipping 267 matching lines @@
       url='http://www.facebook.com/barackobama',
       page_set=page_set,
       name='Facebook')
     self.credentials = 'facebook'
 
   def RunNavigateSteps(self, action_runner):
     action_runner.NavigateToPage(self)
     action_runner.WaitForElement(text='About')
 
   def RunPageInteractions(self, action_runner):
-    action_runner.ClickElement(text='About')
-    action_runner.WaitForNavigate()
-    action_runner.ClickElement(text='The Audacity of Hope')
-    action_runner.WaitForNavigate()
-    action_runner.ClickElement(text='Back to Barack Obama\'s Timeline')
-    action_runner.WaitForNavigate()
-    action_runner.ClickElement(text='About')
-    action_runner.WaitForNavigate()
-    action_runner.ClickElement(text='Elected to U.S. Senate')
-    action_runner.WaitForNavigate()
-    action_runner.ClickElement(text='Home')
-    action_runner.WaitForNavigate()
+    # Scroll and wait for the next page to be loaded.
+    interaction = action_runner.BeginGestureInteraction(
+        'ScrollAction', is_smooth=True)
+    action_runner.ScrollPage()
+    interaction.End()
+    action_runner.WaitForJavaScriptCondition(
+        'document.documentElement.scrollHeight - window.innerHeight - '
+        'window.pageYOffset > 0')
 
+    # Scroll and wait again.
+    interaction = action_runner.BeginGestureInteraction(
+        'ScrollAction', is_smooth=True)
+    action_runner.ScrollPage()
+    interaction.End()
+    action_runner.WaitForJavaScriptCondition(
+        'document.documentElement.scrollHeight - window.innerHeight - '
+        'window.pageYOffset > 0')
 
 class Top7StressPageSet(page_set_module.PageSet):
 
   """ Pages hand-picked for stress testing. """
 
   def __init__(self):
     super(Top7StressPageSet, self).__init__(
       user_agent_type='desktop',
-      archive_data_file='data/top_25.json',
+      archive_data_file='data/top_7_stress.json',
       bucket=page_set_module.PARTNER_BUCKET)
 
     self.AddUserStory(GoogleWebSearchPage(self))
     self.AddUserStory(GmailPage(self))
     self.AddUserStory(GoogleCalendarPage(self))
     self.AddUserStory(GooglePlusPage(self))
     self.AddUserStory(BlogspotPage(self))
     self.AddUserStory(WordpressPage(self))
     self.AddUserStory(FacebookPage(self))