ipc: Write end-to-end tests for SharedMemoryHandle brokering on Mac.

ipc/BUILD.gn

 # Copyright (c) 2012 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")
 
 component("ipc") {
   sources = [
     "attachment_broker.cc",
     "attachment_broker.h",
@@ skipping 126 matching lines @@
 if (!is_android) {
   group("ipc_tests_run") {
     testonly = true
     deps = [
       ":ipc_tests",
     ]
   }
 
   test("ipc_tests") {
     sources = [
+      "attachment_broker_mac_unittest.cc",
       "attachment_broker_privileged_mac_unittest.cc",
       "attachment_broker_privileged_win_unittest.cc",
       "attachment_broker_unprivileged_win_unittest.cc",
       "ipc_channel_posix_unittest.cc",
       "ipc_channel_proxy_unittest.cc",
       "ipc_channel_reader_unittest.cc",
       "ipc_channel_unittest.cc",
       "ipc_fuzzing_tests.cc",
       "ipc_message_attachment_set_posix_unittest.cc",
       "ipc_message_unittest.cc",
@@ skipping 83 matching lines @@
     "test_util_mac.cc",
     "test_util_mac.h",
   ]
   deps = [
     ":ipc",
     "//base",
     "//base/test:test_support",
     "//testing/gtest",
   ]
 }