Migrate infinite scrolls to system health stories

tools/perf/page_sets/data/system_health_mobile.json

 {
     "archives": {
         "background:media:imgur": {
             "DEFAULT": "system_health_mobile_047.wpr"
         },
         "background:news:nytimes": {
             "DEFAULT": "system_health_mobile_052.wpr"
         },
         "background:search:google": {
             "DEFAULT": "system_health_mobile_044.wpr"
@@ skipping 66 matching lines @@
         },
         "browse:social:instagram": {
             "DEFAULT": "system_health_mobile_060.wpr"
         },
         "browse:social:twitter": {
             "DEFAULT": "system_health_mobile_023.wpr"
         },
         "browse:tools:maps": {
             "DEFAULT": "system_health_mobile_059.wpr"
         },
+        "browse:tech:discourse_infinite_scroll": {
+            "DEFAULT": "mobile_infinite_scroll_000.wpr"
+        },
+        "browse:social:facebook_infinite_scroll": {
+            "DEFAULT": "mobile_infinite_scroll_000.wpr"
+        },
+        "browse:media:flickr_infinite_scroll": {
+            "DEFAULT": "mobile_infinite_scroll_000.wpr"
+        },
+        "browse:social:pinterest_infinite_scroll": {
+            "DEFAULT": "mobile_infinite_scroll_001.wpr"
+        },
+        "browse:social:tumblr_infinite_scroll": {
+            "DEFAULT": "mobile_infinite_scroll_000.wpr"
+        },
         "load:games:bubbles": {
             "DEFAULT": "system_health_mobile_005.wpr"
         },
         "load:games:lazors": {
             "DEFAULT": "system_health_mobile_005.wpr"
         },
         "load:games:spychase": {
             "DEFAULT": "system_health_mobile_005.wpr"
         },
         "load:media:9gag": {
@@ skipping 115 matching lines @@
         },
         "long_running:tools:gmail-foreground": {
             "DEFAULT": "system_health_mobile_042.wpr"
         },
         "search:portal:google": {
             "DEFAULT": "system_health_mobile_029.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
-}
+}