Add GCAPI to the GN build.

chrome/chrome_installer.gypi

 # 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.
 
 {
   'variables': {
     'lastchange_path': '../build/util/LASTCHANGE',
     'branding_dir': 'app/theme/<(branding_path_component)',
     'branding_dir_100': 'app/theme/default_100_percent/<(branding_path_component)',
   },
   'conditions': [
     ['OS=="win"', {
       'targets': [
         {
+          # GN version: //chrome/installer/gcapi
           'target_name': 'gcapi_dll',
           'type': 'loadable_module',
           'dependencies': [
             'gcapi_lib',
           ],
           'include_dirs': [
             '..',
           ],
           'sources': [
             'installer/gcapi/gcapi.def',
             'installer/gcapi/gcapi_dll.cc',
           ],
         },
         {
+          # GN version: //chrome/installer/gcapi:lib
           'target_name': 'gcapi_lib',
           'type': 'static_library',
           'dependencies': [
             'installer_util',
             '../base/base.gyp:base',
             '../chrome/chrome.gyp:launcher_support',
             '../components/components.gyp:variations',
             '../google_update/google_update.gyp:google_update',
           ],
           'include_dirs': [
             '..',
           ],
           'sources': [
             'installer/gcapi/gcapi.cc',
             'installer/gcapi/gcapi.h',
             'installer/gcapi/gcapi_omaha_experiment.cc',
             'installer/gcapi/gcapi_omaha_experiment.h',
             'installer/gcapi/gcapi_reactivation.cc',
             'installer/gcapi/gcapi_reactivation.h',
           ],
-          # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-          'msvs_disabled_warnings': [ 4267, ],
         },
         {
+          # GN version: //chrome/installer/gcapi:gcapi_test
           'target_name': 'gcapi_test',
           'type': 'executable',
           'dependencies': [
             'common',
             'gcapi_dll',
             'gcapi_lib',
             'installer_util',
             '../base/base.gyp:base',
             '../base/base.gyp:test_support_base',
             '../components/components.gyp:variations',
@@ skipping 1058 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'setup_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }