Add browse:shopping:amazon:2019 system health story

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

R=perezju@chromium.org

Bug: 878390
Change-Id: I4b09fc6d47e64a972fa63665f7e84b0c61a742f0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1865166Reviewed-by: Juan Antonio Navarro Pérez <perezju@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#706843}

tools/perf/benchmarks/system_health_smoke_test.py

@@ -43,6 +43,7 @@ _DISABLED_TESTS = frozenset({
   # crbug.com/878390 - These stories are already covered by their 2018 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',
   'system_health.memory_mobile/browse:social:instagram',
   'system_health.memory_mobile/browse:news:reddit',

tools/perf/page_sets/data/system_health_mobile.json

@@ -84,6 +84,9 @@
         "browse:shopping:amazon": {
             "DEFAULT": "system_health_mobile_053.wprgo"
         },
+        "browse:shopping:amazon:2019": {
+            "DEFAULT": "system_health_mobile_5f3fefb816.wprgo"
+        },
         "browse:shopping:avito": {
             "DEFAULT": "system_health_mobile_053.wprgo"
         },

tools/perf/page_sets/data/system_health_mobile_5f3fefb816.wprgo.sha1

+5f3fefb81618081a3e6c01e291e8fab68cee1232
\ No newline at end of file

tools/perf/page_sets/system_health/browsing_stories.py

@@ -885,6 +885,16 @@ class BrowseAmazonMobileStory(_ArticleBrowsingStory):
   ITEMS_TO_VISIT = 4
 
 
+class BrowseAmazonMobileStory2019(_ArticleBrowsingStory):
+  NAME = 'browse:shopping:amazon:2019'
+  URL = 'https://www.amazon.com.br/s/?k=telefone+celular'
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
+  TAGS = [story_tags.EMERGING_MARKET, story_tags.YEAR_2019]
+
+  ITEM_SELECTOR = '[class="a-size-base a-color-base a-text-normal"]'
+  ITEMS_TO_VISIT = 4
+
+
 class BrowseLazadaMobileStory(_ArticleBrowsingStory):
   NAME = 'browse:shopping:lazada'
   URL = 'https://www.lazada.co.id/catalog/?q=Wrist+watch'