[perf] Add browse:news:nytimes:2018 system health story

Bug: 878390
Change-Id: I496645dbfe68a1e5603035647ad70167b1107164
Reviewed-on: https://chromium-review.googlesource.com/1236793
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Juan Antonio Navarro Pérez <perezju@chromium.org>
Cr-Commit-Position: refs/heads/master@{#595784}

tools/perf/page_sets/data/system_health_desktop.json

@@ -33,6 +33,9 @@
         "browse:news:nytimes": {
             "DEFAULT": "system_health_desktop_015.wprgo"
         },
+        "browse:news:nytimes:2018": {
+            "DEFAULT": "system_health_desktop_e2dd18933f.wprgo"
+        },
         "browse:news:reddit": {
             "DEFAULT": "system_health_desktop_016.wprgo"
         },

tools/perf/page_sets/data/system_health_desktop_e2dd18933f.wprgo.sha1

+e2dd18933f9299be5ab9c827b1dc1bd33669ca0a
\ No newline at end of file

tools/perf/page_sets/system_health/browsing_stories.py

@@ -196,6 +196,20 @@ class NytimesDesktopStory(_ArticleBrowsingStory):
   TAGS = [story_tags.YEAR_2016]
 
 
+class NytimesDesktopStory2018(_ArticleBrowsingStory):
+  """
+  The third top website in http://www.alexa.com/topsites/category/News
+  Known Replay Errors:
+  - window.EventTracker is not loaded
+  - all network errors are related to ads
+  """
+  NAME = 'browse:news:nytimes:2018'
+  URL = 'http://www.nytimes.com'
+  ITEM_SELECTOR = "a[href*='/2018/']"
+  SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
+  TAGS = [story_tags.YEAR_2018]
+
+
 # Desktop qq.com opens a news item in a separate tab, for which the back button
 # does not work.
 class QqMobileStory(_ArticleBrowsingStory):