Run Mus Demo and WS tests on Ozone Linux bot

testing/buildbot/chromium.fyi.json

Index: testing/buildbot/chromium.fyi.json
diff --git a/testing/buildbot/chromium.fyi.json b/testing/buildbot/chromium.fyi.json
index aa7ef08b471e17988450483416575ebbf2cb4e66..06855ca27ba585faef91f79f3c6b0ea04dbef025 100644
--- a/testing/buildbot/chromium.fyi.json
+++ b/testing/buildbot/chromium.fyi.json
@@ -10253,6 +10253,28 @@
       "all"
     ]
   },
+  "Linux Ozone": {
+    "gtest_tests": [
+      {
+        "args": [
+          "--ozone-platform=headless"
+        ],
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
+        "test": "mus_demo_unittests"
+      },
+      {
+        "args": [
+          "--ozone-platform=headless"
+        ],
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
+        "test": "mus_ws_unittests"
+      }
+    ]
+  },
   "Linux Trusty": {
     "gtest_tests": [
       {