Add installer_util_unittests to the GN windows build

chrome/installer/test/BUILD.gn

+# Copyright 2015 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("//testing/test.gni")
+
+assert(is_win)
+
+executable("alternate_version_generator") {
+  testonly = true
+  sources = [
+    "alternate_version_generator_main.cc",
+  ]
+
+  deps = [
+    ":alternate_version_generator_lib",
+    "//base",
+    "//base/test:test_support",
+    "//chrome/common:constants",
+    "//chrome/installer/util",
+    "//testing/gtest",
+  ]
+}
+
+source_set("alternate_version_generator_lib") {
+  testonly = true
+  sources = [
+    "alternate_version_generator.cc",
+    "alternate_version_generator.h",
+    "pe_image_resources.cc",
+    "pe_image_resources.h",
+    "resource_loader.cc",
+    "resource_loader.h",
+    "resource_updater.cc",
+    "resource_updater.h",
+  ]
+  deps = [
+    "//base",
+    "//chrome/installer/util",
+    "//chrome/common:constants",
+  ]
+}
+
+test("upgrade_test") {
+  sources = [
+    "run_all_tests.cc",
+    "upgrade_test.cc",
+  ]
+  deps = [
+    ":alternate_version_generator_lib",
+    "//base",
+    "//base/test:test_support",
+    "//chrome/common:constants",
+    "//chrome/installer/util",
+    "//testing/gtest",
+  ]
+  data_deps = [
+    # 'mini_installer.gyp:mini_installer',  TODO(GYP)
+  ]
+}