Move remaining test targets out of //mojo/public.

mojo/public/cpp/utility/tests/BUILD.gn

Index: mojo/public/cpp/utility/tests/BUILD.gn
diff --git a/mojo/public/cpp/utility/tests/BUILD.gn b/mojo/public/cpp/utility/tests/BUILD.gn
index 67419d4b4243526dd5a9930a0fbdbabbacfbd431..a8a96c1c29503796ac0011fa1f1cd70dc8219afa 100644
--- a/mojo/public/cpp/utility/tests/BUILD.gn
+++ b/mojo/public/cpp/utility/tests/BUILD.gn
@@ -2,18 +2,23 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-# GYP version: mojo/mojo_base.gyp:mojo_public_utility_unittests
-test("mojo_public_utility_unittests") {
+import("../../../mojo_sdk.gni")
+
+mojo_sdk_source_set("tests") {
+  testonly = true
+
+  sources = [
+    "run_loop_unittest.cc",
+  ]
+
   deps = [
-    "//mojo/edk/test:run_all_unittests",
-    "//mojo/public/cpp/system",
-    "//mojo/public/cpp/test_support:test_utils",
-    "//mojo/public/cpp/utility",
     "//testing/gtest",
   ]
 
-  sources = [
-    "run_loop_unittest.cc",
+  mojo_sdk_deps = [
+    "mojo/public/cpp/system",
+    "mojo/public/cpp/test_support:test_utils",
+    "mojo/public/cpp/utility",
   ]
 
   # crbug.com/342893