Add browse:news:reddit:2019 system health story

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

R=perezju@chromium.org

Bug: 878390
Change-Id: I2ff70c83ba5bc3e2e0f482ab188c3c5992bad4c7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1815123
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Auto-Submit: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Juan Antonio Navarro Pérez <perezju@chromium.org>
Cr-Commit-Position: refs/heads/master@{#699332}

tools/perf/benchmarks/system_health_smoke_test.py

@@ -42,6 +42,7 @@ _DISABLED_TESTS = frozenset({
   'system_health.memory_mobile/browse:tech:discourse_infinite_scroll',
   'system_health.memory_mobile/browse:social:facebook_infinite_scroll',
   'system_health.memory_mobile/browse:social:instagram',
+  'system_health.memory_mobile/browse:news:reddit',
   'system_health.memory_mobile/browse:social:tumblr_infinite_scroll',
   'system_health.memory_mobile/browse:tools:maps',
   'system_health.memory_mobile/browse:news:cnn',

tools/perf/page_sets/data/system_health_mobile.json

@@ -63,6 +63,9 @@
         "browse:news:reddit": {
             "DEFAULT": "system_health_mobile_027.wprgo"
         },
+        "browse:news:reddit:2019": {
+            "DEFAULT": "system_health_mobile_1a5563286a.wprgo"
+        },
         "browse:news:toi": {
             "DEFAULT": "system_health_mobile_064.wprgo"
         },

tools/perf/page_sets/data/system_health_mobile_1a5563286a.wprgo.sha1

+1a5563286a468da721755207026403338f629d23
\ No newline at end of file

tools/perf/page_sets/system_health/browsing_stories.py

@@ -238,6 +238,30 @@ class RedditMobileStory(_ArticleBrowsingStory):
   SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
   TAGS = [story_tags.YEAR_2016]
 
+class RedditMobileStory2019(_ArticleBrowsingStory):
+  NAME = 'browse:news:reddit:2019'
+  URL = 'https://www.reddit.com/r/news/top/?sort=top&t=week'
+  IS_SINGLE_PAGE_APP = True
+  ITEM_SELECTOR = '.PostHeader__post-title-line'
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
+  TAGS = [story_tags.YEAR_2019]
+
+  def _DidLoadDocument(self, action_runner):
+    # We encountered ads disguised as articles on the Reddit one so far. The
+    # following code skips that ad.
+    # If we encounter it more often it will make sense to have a more generic
+    # approach, e.g an OFFSET to start iterating from, or an index to skip.
+
+    # Add one to the items to visit since we are going to skip the ad and we
+    # want to still visit the same amount of articles.
+    for i in xrange(self.ITEMS_TO_VISIT + 1):
+      # Skip the ad disguised as an article.
+      if i == 1:
+           continue
+      self._NavigateToItem(action_runner, i)
+      self._ReadNextArticle(action_runner)
+      self._NavigateBack(action_runner)
+      self._ScrollMainPage(action_runner)
 
 class TwitterMobileStory(_ArticleBrowsingStory):
   NAME = 'browse:social:twitter'