Move the test template to //testing/test.gni (part 2)

ui/ozone/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.
 
 import("//ui/ozone/ozone.gni")
+import("//testing/rules.gni")
 
 # The list of platforms that will be built.
 ozone_platforms = []
 
 # Extra dependencies to pull into ui/ozone for built platforms.
 ozone_platform_deps = []
 
 # Extra dependencies to pull into ozone_unittests for built platforms.
 ozone_platform_test_deps = []
 
@@ skipping 155 matching lines @@
 test("ozone_unittests") {
   sources = [
     "run_all_unittests.cc",
   ]
 
   deps = [
            "//base/test:test_support",
            "//testing/gtest",
          ] + ozone_platform_test_deps
 }