Move most of the component updater artifacts to update_client.

components/update_client.gypi

 # 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.
 
 {
   'targets': [
     {
+      # GN version: //components/update_client
       'target_name': 'update_client',
       'type': 'static_library',
+      'dependencies': [
+        '../base/base.gyp:base',
+        '../courgette/courgette.gyp:courgette_lib',
+        '../crypto/crypto.gyp:crypto',
+        '../third_party/libxml/libxml.gyp:libxml',
+        '../third_party/zlib/google/zip.gyp:zip',
+        '../net/net.gyp:net',
+        '../url/url.gyp:url_lib',
+        'crx_file',
+      ],
+
       'include_dirs': [
         '..',
       ],
-      'dependencies': [
-        '../base/base.gyp:base',
-      ],
       'sources': [
+        'update_client/background_downloader_win.cc',
+        'update_client/background_downloader_win.h',
+        'update_client/component_patcher.cc',
+        'update_client/component_patcher.h',
+        'update_client/component_patcher_operation.cc',
+        'update_client/component_patcher_operation.h',
+        'update_client/component_unpacker.cc',
+        'update_client/component_unpacker.h',
+        'update_client/ping_manager.cc',
+        'update_client/ping_manager.h',
+        'update_client/crx_update_item.h',
+        'update_client/crx_downloader.cc',
+        'update_client/crx_downloader.h',
+        'update_client/request_sender.cc',
+        'update_client/request_sender.h',
+        'update_client/update_checker.cc',
+        'update_client/update_checker.h',
+        'update_client/update_client.cc',
+        'update_client/update_client.h',
+        'update_client/update_response.cc',
+        'update_client/update_response.h',
         'update_client/update_query_params.cc',
         'update_client/update_query_params.h',
         'update_client/update_query_params_delegate.cc',
         'update_client/update_query_params_delegate.h',
+        'update_client/url_fetcher_downloader.cc',
+        'update_client/url_fetcher_downloader.h',
+        'update_client/utils.cc',
+        'update_client/utils.h',
+      ],
+    },
+    {
+      # GN version: //components/update_client:test_support
+      'target_name': 'update_client_test_support',
+      'type': 'static_library',
+      'dependencies': [
+        'update_client',
+        '../testing/gmock.gyp:gmock',
+        '../testing/gtest.gyp:gtest',
+      ],
+
+      'include_dirs': [
+        '..',
+      ],
+      'sources': [
+        'update_client/test/test_configurator.cc',
+        'update_client/test/test_configurator.h',
+        'update_client/test/test_installer.cc',
+        'update_client/test/test_installer.h',
+        'update_client/test/url_request_post_interceptor.cc',
+        'update_client/test/url_request_post_interceptor.h',
       ],
     },
   ],
 }