Make application shortcuts point to app_host.exe, install App Host during app installation.

chrome/chrome_browser_extensions.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.
 
 {
   'targets': [
     {
       'target_name': 'browser_extensions',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 326 matching lines @@
         'browser/extensions/api/web_request/web_request_api_helpers.cc',
         'browser/extensions/api/web_request/web_request_api_helpers.h',
         'browser/extensions/api/web_request/web_request_permissions.cc',
         'browser/extensions/api/web_request/web_request_permissions.h',
         'browser/extensions/api/web_request/web_request_time_tracker.cc',
         'browser/extensions/api/web_request/web_request_time_tracker.h',
         'browser/extensions/api/web_socket_proxy_private/web_socket_proxy_private_api.cc',
         'browser/extensions/api/web_socket_proxy_private/web_socket_proxy_private_api.h',
         'browser/extensions/api/webstore_private/webstore_private_api.cc',
         'browser/extensions/api/webstore_private/webstore_private_api.h',
+        'browser/extensions/app_host_installer_win.cc',
+        'browser/extensions/app_host_installer_win.h',
         'browser/extensions/app_notification.cc',
         'browser/extensions/app_notification.h',
         'browser/extensions/app_notification_manager.cc',
         'browser/extensions/app_notification_manager.h',
         'browser/extensions/app_notification_storage.cc',
         'browser/extensions/app_notification_storage.h',
         'browser/extensions/app_notify_channel_setup.cc',
         'browser/extensions/app_notify_channel_setup.h',
         'browser/extensions/app_notify_channel_ui.h',
         'browser/extensions/app_notify_channel_ui_impl.cc',
@@ skipping 403 matching lines @@
             'app/policy/cloud_policy_codegen.gyp:policy',
           ],
         }, {  # configuration_policy==0
           'sources!': [
             'browser/extensions/settings/managed_value_store_cache.cc',
             'browser/extensions/settings/managed_value_store_cache.h',
           ],
         }],
         ['OS=="win"', {
           'dependencies': [
+            'launcher_support',
             '../third_party/iaccessible2/iaccessible2.gyp:iaccessible2',
             '../third_party/isimpledom/isimpledom.gyp:isimpledom',
           ],
           'conditions': [
             ['win_use_allocator_shim==1', {
               'dependencies': [
                 '<(allocator_target)',
               ],
             }],
           ],
@@ skipping 97 matching lines @@
             'browser/extensions/app_host/update.cc',
             'browser/extensions/app_host/update.h',
             '<(SHARED_INTERMEDIATE_DIR)/chrome_version/app_host_exe_version.rc',
           ],
         },
       ],
     }, ],  # 'OS=="win"'
   ],  # 'conditions'
 }