Add browse:media:youtube:2019 to system health story

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

BUG=878390

Change-Id: Iaa5ef08ba5e3ef16c5977b4729be548541c9e9d4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1825239
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Caleb Rouleau <crouleau@chromium.org>
Auto-Submit: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712984}

tools/perf/benchmarks/system_health_smoke_test.py

@@ -39,8 +39,8 @@ _DISABLED_TESTS = frozenset({
   # crbug.com/983326 - flaky.
   'system_health.memory_desktop/browse_accessibility:media:youtube',
 
-  # crbug.com/878390 - These stories are already covered by their 2018 versions
-  # and will later be removed.
+  # crbug.com/878390 - These stories are already covered by their 2018 or
+  # 2019 versions and will later be removed.
   'system_health.memory_mobile/browse:tech:discourse_infinite_scroll',
   'system_health.memory_mobile/browse:shopping:amazon',
   'system_health.memory_mobile/browse:social:facebook_infinite_scroll',
@@ -51,6 +51,7 @@ _DISABLED_TESTS = frozenset({
   'system_health.memory_mobile/browse:tools:maps',
   'system_health.memory_mobile/browse:news:cnn',
   'system_health.memory_mobile/browse:news:washingtonpost',
+  'system_health.memory_mobile/browse:media:youtube',
   'system_health.memory_mobile/load:media:facebook_photos',
   'system_health.memory_mobile/load:news:cnn',
   'system_health.memory_mobile/load:news:nytimes',

tools/perf/page_sets/data/system_health_mobile.json

@@ -36,6 +36,9 @@
         "browse:media:youtube": {
             "DEFAULT": "system_health_mobile_037.wprgo"
         },
+        "browse:media:youtube:2019": {
+            "DEFAULT": "system_health_mobile_d70a6c0a79.wprgo"
+        },
         "browse:news:cnn": {
             "DEFAULT": "system_health_mobile_014.wprgo"
         },

tools/perf/page_sets/data/system_health_mobile_d70a6c0a79.wprgo.sha1

+b0aba2772f707c10fdc2f0f4897ac3056304ee72
\ No newline at end of file

tools/perf/page_sets/system_health/browsing_stories.py

@@ -604,6 +604,20 @@ class YouTubeMobileStory(_MediaBrowsingStory):
           story_tags.HEALTH_CHECK, story_tags.YEAR_2016]
 
 
+class YouTubeMobileStory2019(_MediaBrowsingStory):
+  """Load a typical YouTube video then navigate to a next few videos. Stop and
+  watch each video for few seconds.
+  """
+  NAME = 'browse:media:youtube:2019'
+  URL = 'https://m.youtube.com/watch?v=TcMBFSGVi1c&autoplay=false'
+  ITEM_SELECTOR = '.compact-media-item > a'
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
+  IS_SINGLE_PAGE_APP = True
+  ITEM_SELECTOR_INDEX = 3
+  TAGS = [story_tags.JAVASCRIPT_HEAVY, story_tags.EMERGING_MARKET,
+          story_tags.HEALTH_CHECK, story_tags.YEAR_2019]
+
+
 class YouTubeDesktopStory2019(_MediaBrowsingStory):
   """Load a typical YouTube video then navigate to a next few videos. Stop and
   watch each video for a few seconds.