Add //ipc to "gn check", work on base

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 = [
     "ipc_channel.cc",
     "ipc_channel.h",
@@ skipping 163 matching lines @@
     "ipc_test_base.cc",
     "ipc_test_base.h",
     "ipc_test_channel_listener.cc",
     "ipc_test_channel_listener.h",
     "ipc_test_sink.cc",
     "ipc_test_sink.h",
   ]
   deps = [
     ":ipc",
     "//base",
+    "//base/test:test_support",
     "//testing/gtest",
   ]
 }