Add missing .h files to .gn files that have a .cc file next to it in the gn file already.

components/update_client/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("//net/features.gni")
 
 static_library("update_client") {
   sources = [
     "action.cc",
     "action.h",
@@ skipping 104 matching lines @@
   outputs = [
     "{{bundle_resources_dir}}/" +
         "{{source_root_relative_dir}}/{{source_file_part}}",
   ]
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
     "component_patcher_unittest.cc",
+    "component_patcher_unittest.h",
     "component_unpacker_unittest.cc",
     "persisted_data_unittest.cc",
     "ping_manager_unittest.cc",
     "request_sender_unittest.cc",
     "update_checker_unittest.cc",
     "update_client_unittest.cc",
     "update_query_params_unittest.cc",
     "update_response_unittest.cc",
     "updater_state_unittest.cc",
     "utils_unittest.cc",
@@ skipping 10 matching lines @@
     "//base",
     "//components/prefs",
     "//components/prefs:test_support",
     "//courgette:courgette_lib",
     "//net:test_support",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/libxml",
   ]
 }