Revert of [perfbot sheriff] Disables discourse.org in the infinite scroll pageset

tools/perf/page_sets/infinite_scroll_cases.py

Index: tools/perf/page_sets/infinite_scroll_cases.py
diff --git a/tools/perf/page_sets/infinite_scroll_cases.py b/tools/perf/page_sets/infinite_scroll_cases.py
index 4d37f9638e922c8dba50d9e316e67ecdb69cd29c..7930a6e70a2cc9078b1f9fa0ba57692faf46991e 100644
--- a/tools/perf/page_sets/infinite_scroll_cases.py
+++ b/tools/perf/page_sets/infinite_scroll_cases.py
@@ -71,12 +71,9 @@
         ('https://www.facebook.com/shakira', 'facebook', SCROLL_FAR, 0, 0),
         ('https://twitter.com/taylorswift13', 'twitter', SCROLL_PAGE, 10, 30),
         ('http://techcrunch.tumblr.com/', 'tumblr', SCROLL_FAR, 0, 0),
-        ('https://www.flickr.com/explore', 'flickr', SCROLL_FAR, 0, 0)
-        # TODO(crbug.com/612153): This page needs to be rerecorded due to an
-        # expired SSL certificate, but can't be due to problems with WPR.
-        # pylint: disable=line-too-long
-        # ('https://meta.discourse.org/t/the-official-discourse-tags-plugin-discourse-tagging/26482',
-        # 'discourse', SCROLL_PAGE, 10, 30)
+        ('https://www.flickr.com/explore', 'flickr', SCROLL_FAR, 0, 0),
+        ('https://meta.discourse.org/t/the-official-discourse-tags-plugin-discourse-tagging/26482',
+         'discourse', SCROLL_PAGE, 10, 30)
     ]
     for (url, name, scroll_amount, delay, repeat) in pages:
       self.AddStory(