Remove web_app_ui.[cc|h].

chrome/chrome_browser_ui.gypi

 # Copyright 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_ui',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 2193 matching lines @@
         'browser/ui/views/validation_message_bubble_delegate.cc',
         'browser/ui/views/validation_message_bubble_view.cc',
         'browser/ui/views/web_contents_modal_dialog_manager_views.cc',
         'browser/ui/views/website_settings/permission_selector_view.cc',
         'browser/ui/views/website_settings/permission_selector_view.h',
         'browser/ui/views/website_settings/permissions_bubble_view.cc',
         'browser/ui/views/website_settings/permissions_bubble_view.h',
         'browser/ui/views/website_settings/permission_selector_view_observer.h',
         'browser/ui/views/website_settings/website_settings_popup_view.cc',
         'browser/ui/views/website_settings/website_settings_popup_view.h',
-        'browser/ui/web_applications/web_app_ui.cc',
-        'browser/ui/web_applications/web_app_ui.h',
         'browser/ui/website_settings/permission_bubble_manager.cc',
         'browser/ui/website_settings/permission_bubble_manager.h',
         'browser/ui/website_settings/permission_bubble_request.h',
         'browser/ui/website_settings/permission_bubble_view.h',
         'browser/ui/website_settings/permission_menu_model.cc',
         'browser/ui/website_settings/permission_menu_model.h',
         'browser/ui/website_settings/website_settings.cc',
         'browser/ui/website_settings/website_settings.h',
         'browser/ui/website_settings/website_settings_infobar_delegate.cc',
         'browser/ui/website_settings/website_settings_infobar_delegate.h',
@@ skipping 1216 matching lines @@
             'browser/ui/webui/local_discovery/local_discovery_ui.cc',
             'browser/ui/webui/local_discovery/local_discovery_ui.h',
             'browser/ui/webui/local_discovery/local_discovery_ui_handler.cc',
             'browser/ui/webui/local_discovery/local_discovery_ui_handler.h',
           ],
         }],
       ],
     },
   ],
 }