renames mus_ws_unittests to ui_service_unittests

testing/buildbot/chromium.chromiumos.json

Index: testing/buildbot/chromium.chromiumos.json
diff --git a/testing/buildbot/chromium.chromiumos.json b/testing/buildbot/chromium.chromiumos.json
index 92559933db369263fb002da19d15c42eae1ea314..aaf72ff853f966ee77d20f53862cb046dc475561 100644
--- a/testing/buildbot/chromium.chromiumos.json
+++ b/testing/buildbot/chromium.chromiumos.json
@@ -309,12 +309,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "mus_ws_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "nacl_helper_nonsfi_unittests"
       },
       {
@@ -432,6 +426,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "ui_service_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "ui_struct_traits_unittests"
       },
       {