Ensure the services gpu tests run with ozone.

services/test/BUILD.gn

Index: services/test/BUILD.gn
diff --git a/services/test/BUILD.gn b/services/test/BUILD.gn
index 1aa2e8668b81a887aa73a21d2586022888bb8561..df1f2194505aaa5544c7fd2d14a37de99daea907 100644
--- a/services/test/BUILD.gn
+++ b/services/test/BUILD.gn
@@ -2,6 +2,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/ui.gni")
+
 source_set("run_all_service_tests") {
   # This target is in a separate directory because we want to expand DEPS so
   # that it not all of //services can access //ui.
@@ -27,4 +29,8 @@ source_set("run_all_service_tests") {
   if (is_android) {
     deps += [ "//mojo/android:libsystem_java" ]
   }
+
+  if (use_ozone) {
+    deps += [ "//ui/ozone" ]
+  }
 }