Add more components to "gn check"

components/pairing/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("//third_party/protobuf/proto_library.gni")
 
 source_set("pairing") {
   sources = [
     "bluetooth_controller_pairing_controller.cc",
     "bluetooth_controller_pairing_controller.h",
@@ skipping 26 matching lines @@
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
     "message_buffer_unittest.cc",
   ]
 
   deps = [
     ":pairing",
+    "//net",
     "//testing/gtest",
   ]
 }
 
 proto_library("proto") {
   sources = [
     "pairing_api.proto",
   ]
 }