Add browse:social:facebook:2019 system health story

This CL was created automatically with tools/perf/update_wpr script

R=crouleau@chromium.org

Change-Id: I9e4374144f3358e6b02d25bdb8a6ea034aedd13c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1976700
Commit-Queue: Caleb Rouleau <crouleau@chromium.org>
Reviewed-by: Caleb Rouleau <crouleau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727998}

tools/perf/benchmarks/system_health_smoke_test.py

@@ -51,6 +51,7 @@ _DISABLED_TESTS = frozenset({
   'system_health.memory_mobile/browse:media:imgur'
   'system_health.memory_mobile/browse:tech:discourse_infinite_scroll',
   'system_health.memory_mobile/browse:shopping:amazon',
+  'system_health.memory_mobile/browse:social:facebook',
   'system_health.memory_mobile/browse:social:facebook_infinite_scroll',
   'system_health.memory_mobile/browse:social:pinterest_infinite_scroll',
   'system_health.memory_mobile/browse:media:facebook_photos',

tools/perf/page_sets/data/credentials.json.sha1

-6840cad1ab0a693cc418aadd60718c195eb48445
\ No newline at end of file
+180cf6cb3acbf869cb4e5ba6c071b1e6ba9f9d11
\ No newline at end of file

tools/perf/page_sets/data/system_health_mobile.json

@@ -150,6 +150,9 @@
         "browse:social:facebook": {
             "DEFAULT": "system_health_mobile_028.wprgo"
         },
+        "browse:social:facebook:2019": {
+            "DEFAULT": "system_health_mobile_77b7808065.wprgo"
+        },
         "browse:social:facebook_infinite_scroll": {
             "DEFAULT": "system_health_mobile_062.wprgo"
         },

tools/perf/page_sets/data/system_health_mobile_77b7808065.wprgo.sha1

+77b7808065f53e5aa2dfe7e8a742d6f4af769c15
\ No newline at end of file

tools/perf/page_sets/system_health/browsing_stories.py

@@ -83,8 +83,14 @@ class _ArticleBrowsingStory(_BrowsingStory):
   # Some devices take long to load news webpages crbug.com/713036. Set to None
   # because we cannot access DEFAULT_WEB_CONTENTS_TIMEOUT from this file.
   COMPLETE_STATE_WAIT_TIMEOUT = None
+  # On some pages (for ex: facebook) articles appear only after we start
+  # scrolling. This specifies if we need scroll main page.
+  SCROLL_BEFORE_BROWSE = False
 
   def _DidLoadDocument(self, action_runner):
+    # Scroll main page if needed before we start browsing articles.
+    if self.SCROLL_BEFORE_BROWSE:
+      self._ScrollMainPage(action_runner)
     for i in xrange(self.ITEMS_TO_VISIT):
       self._NavigateToItem(action_runner, i)
       self._ReadNextArticle(action_runner)
@@ -134,6 +140,34 @@ class FacebookMobileStory(_ArticleBrowsingStory):
   TAGS = [story_tags.EMERGING_MARKET, story_tags.YEAR_2016]
 
 
+class FacebookMobileStory2019(_ArticleBrowsingStory):
+  NAME = 'browse:social:facebook:2019'
+  URL = 'https://www.facebook.com/rihanna'
+  ITEM_SELECTOR = '._5msj'
+  MAIN_PAGE_SCROLL_REPEAT = 1
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
+  IS_SINGLE_PAGE_APP = True
+  SCROLL_BEFORE_BROWSE = True
+
+  TAGS = [story_tags.EMERGING_MARKET, story_tags.YEAR_2019]
+
+  def _Login(self, action_runner):
+    facebook_login.LoginWithMobileSite(action_runner, 'facebook4')
+
+  def _ScrollMainPage(self, action_runner):
+    action_runner.tab.WaitForDocumentReadyStateToBeComplete()
+    # Facebook loads content dynamically. So keep trying to scroll till we find
+    # the elements. Retry 5 times waiting a bit each time.
+    for _ in xrange(5):
+      action_runner.RepeatableBrowserDrivenScroll(
+          repeat_count=self.MAIN_PAGE_SCROLL_REPEAT)
+      result = action_runner.EvaluateJavaScript(
+          'document.querySelectorAll("._5msj").length')
+      if result:
+        break
+      action_runner.Wait(1)
+
+
 class FacebookDesktopStory(_ArticleBrowsingStory):
   NAME = 'browse:social:facebook'
   URL = 'https://www.facebook.com/rihanna'

tools/perf/system_health_stories.csv

@@ -58,6 +58,7 @@ browse:shopping:flipkart,,mobile,"2016,emerging_market"
 browse:shopping:lazada,,mobile,"2016,emerging_market"
 browse:shopping:lazada:2019,,mobile,"2019,emerging_market"
 browse:social:facebook,,mobile,"2016,emerging_market"
+browse:social:facebook:2019,,mobile,"2019,emerging_market"
 browse:social:facebook_infinite_scroll,,mobile,2016
 browse:social:facebook_infinite_scroll:2018,,"desktop,mobile","2018,infinite_scroll"
 browse:social:instagram,,mobile,"2016,emerging_market"