Migrate infinite scrolls to system health stories

tools/perf/page_sets/data/system_health_desktop.json

 {
     "archives": {
         "browse:media:imgur": {
             "DEFAULT": "system_health_desktop_025.wpr"
         },
         "browse:media:pinterest": {
             "DEFAULT": "system_health_desktop_035.wpr"
         },
         "browse:media:tumblr": {
             "DEFAULT": "system_health_desktop_036.wpr"
@@ skipping 27 matching lines @@
         },
         "browse:social:twitter": {
             "DEFAULT": "system_health_desktop_053.wpr"
         },
         "browse:tools:earth": {
             "DEFAULT": "system_health_desktop_050.wpr"
         },
         "browse:tools:maps": {
             "DEFAULT": "system_health_desktop_052.wpr"
         },
+        "browse:tech:discourse_infinite_scroll": {
+            "DEFAULT": "infinite_scroll_004.wpr"
+        },
+        "browse:social:facebook_infinite_scroll": {
+            "DEFAULT": "infinite_scroll_001.wpr"
+        },
+        "browse:media:flickr_infinite_scroll": {
+            "DEFAULT": "infinite_scroll_003.wpr"
+        },
+        "browse:social:tumblr_infinite_scroll": {
+            "DEFAULT": "infinite_scroll_002.wpr"
+        },
+        "browse:social:twitter_infinite_scroll": {
+            "DEFAULT": "infinite_scroll_000.wpr"
+        },
         "load:games:alphabetty": {
             "DEFAULT": "system_health_desktop_005.wpr"
         },
         "load:games:bubbles": {
             "DEFAULT": "system_health_desktop_005.wpr"
         },
         "load:games:lazors": {
             "DEFAULT": "system_health_desktop_005.wpr"
         },
         "load:games:miniclip": {
@@ skipping 130 matching lines @@
         },
         "play:media:soundcloud": {
             "DEFAULT": "system_health_desktop_030.wpr"
         },
         "search:portal:google": {
             "DEFAULT": "system_health_desktop_022.wpr"
         }
     },
     "description": "Describes the Web Page Replay archives for a story set. Don't edit by hand! Use record_wpr for updating.",
     "platform_specific": true
-}
+}