Update mojo sdk to rev cc531b32182099a5a034a99daff35ed5d38a61c8

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

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # 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") {
-  deps = [
-    "//mojo/edk/test:run_all_unittests",
-    "//mojo/public/cpp/system",
-    "//mojo/public/cpp/test_support:test_utils",
-    "//mojo/public/cpp/utility",
-    "//testing/gtest",
-  ]
+import("../../../mojo_sdk.gni")
+
+mojo_sdk_source_set("tests") {
+  testonly = true
 
   sources = [
     "run_loop_unittest.cc",
   ]
 
+  deps = [
+    "//testing/gtest",
+  ]
+
+  mojo_sdk_deps = [
+    "mojo/public/cpp/system",
+    "mojo/public/cpp/test_support:test_utils",
+    "mojo/public/cpp/utility",
+  ]
+
   # crbug.com/342893
   if (!is_win) {
     sources += [
       "mutex_unittest.cc",
       "thread_unittest.cc",
     ]
   }
 }