Enable loading.desktop benchmark with network service enabled on perf fyi bot.

testing/buildbot/chromium.perf.fyi.json

Index: testing/buildbot/chromium.perf.fyi.json
diff --git a/testing/buildbot/chromium.perf.fyi.json b/testing/buildbot/chromium.perf.fyi.json
index 15815974a41ab04c4ffb43cea4e1e5ebb1a0ecf1..332415242dfaefd21edd2455c8d66de6c1113228 100644
--- a/testing/buildbot/chromium.perf.fyi.json
+++ b/testing/buildbot/chromium.perf.fyi.json
@@ -4754,6 +4754,31 @@
       }
     ]
   },
+  "Mojo Linux Perf": {
+    "isolated_scripts": [
+      {
+        "args": [
+          "loading.desktop.network_service",
+          "-v",
+          "--upload-results",
+          "--output-format=chartjson",
+          "--browser=release"
+        ],
+        "isolate_name": "telemetry_perf_tests",
+        "name": "loading.desktop.network_service",
+        "override_compile_targets": [
+          "telemetry_perf_tests"
+        ],
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "expiration": 36000,
+          "hard_timeout": 10800,
+          "ignore_task_failure": false,
+          "io_timeout": 3600
+        }
+      }
+    ]
+  },
   "Win 10 4 Core Low-End Perf Tests": {
     "isolated_scripts": [
       {