Reland: Remove some dead app host code.

chrome/chrome_browser_extensions.gypi

 # Copyright (c) 2013 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': {
     # These variables are shared with the GN build.
     # Name is that these are the extensions files for the extensions target.
     # "chrome_browser_extensions_sources' are the extensions files in the
     # browser target.
@@ skipping 1116 matching lines @@
         ['OS=="win" or OS=="mac"', {
           'dependencies': [
             '../components/components.gyp:wifi_component',
           ],
           'sources': [
             '<@(chrome_browser_extensions_networking_private_sources)',
           ],
         }],
         ['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 26 matching lines @@
         }],
         ['enable_app_list==1', {
           'sources': [
             '<@(chrome_browser_extensions_app_list_sources)',
           ],
         }]
       ],
     },
   ],
 }