Add load_accessibility:shopping:amazon:2018 story

Bug: 878390
Change-Id: I66e2329a2c94e3657b1685b6fb74f4bbc79d211e
Reviewed-on: https://chromium-review.googlesource.com/1222873
Commit-Queue: James Wallace-Lee <jamwalla@chromium.org>
Reviewed-by: Juan Antonio Navarro Pérez <perezju@chromium.org>
Cr-Commit-Position: refs/heads/master@{#594796}

tools/perf/page_sets/data/system_health_desktop.json

@@ -222,6 +222,9 @@
         "load_accessibility:shopping:amazon": {
             "DEFAULT": "system_health_desktop_059.wprgo"
         },
+        "load_accessibility:shopping:amazon:2018": {
+            "DEFAULT": "system_health_desktop_c69a8c0e2f.wprgo"
+        },
         "long_running:tools:gmail-background": {
             "DEFAULT": "system_health_desktop_028.wprgo"
         },

tools/perf/page_sets/data/system_health_desktop_c69a8c0e2f.wprgo.sha1

+c69a8c0e2fb116df8deaea080038906c4c2a46b1
\ No newline at end of file

tools/perf/page_sets/system_health/accessibility_stories.py

@@ -68,6 +68,11 @@ class AccessibilityAmazonStory(_AccessibilityStory):
   URL = 'https://www.amazon.com/gp/offer-listing/B01IENFJ14'
   TAGS = [story_tags.ACCESSIBILITY, story_tags.YEAR_2016]
 
+class AccessibilityAmazonStory2018(_AccessibilityStory):
+  """Amazon results page. Good example of a site with a data table."""
+  NAME = 'load_accessibility:shopping:amazon:2018'
+  URL = 'https://www.amazon.com/gp/offer-listing/B01IENFJ14'
+  TAGS = [story_tags.ACCESSIBILITY, story_tags.YEAR_2018]
 
 class AccessibilityYouTubeHomepageStory(_AccessibilityStory):
   """Tests interacting with the YouTube home page."""