[system-health] Update WPR for browse:social:facebook and browse:news:reddit on mobile

tools/perf/page_sets/data/system_health_mobile.json

Index: tools/perf/page_sets/data/system_health_mobile.json
diff --git a/tools/perf/page_sets/data/system_health_mobile.json b/tools/perf/page_sets/data/system_health_mobile.json
index ad01029fbf5071a3a72c0a48737fab558a6e2cb0..6c68215594388e6c6b0d23b30936ad7df07f4766 100644
--- a/tools/perf/page_sets/data/system_health_mobile.json
+++ b/tools/perf/page_sets/data/system_health_mobile.json
@@ -65,9 +65,6 @@
         "system_health_mobile_014.wpr": [
             "browse:news:cnn"
         ],
-        "system_health_mobile_015.wpr": [
-            "browse:social:facebook"
-        ],
         "system_health_mobile_016.wpr": [
             "browse:news:hackernews"
         ],
@@ -77,9 +74,6 @@
         "system_health_mobile_018.wpr": [
             "browse:news:qq"
         ],
-        "system_health_mobile_019.wpr": [
-            "browse:news:reddit"
-        ],
         "system_health_mobile_021.wpr": [
             "browse:news:washingtonpost"
         ],
@@ -94,6 +88,12 @@
         ],
         "system_health_mobile_025.wpr": [
             "browse:news:flipboard"
+        ],
+        "system_health_mobile_026.wpr": [
+            "browse:social:facebook"
+        ],
+        "system_health_mobile_027.wpr": [
+            "browse:news:reddit"
         ]
     },
     "description": "Describes the Web Page Replay archives for a story set. Don't edit by hand! Use record_wpr for updating."