Implement base class for app_list items.

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.
 
 {
   'variables': {
     # There are two sections of sources:
     # * "Platform"-based sources (OS, toolkit, etc.)
     # * Feature/directory-based sources (e.g., history, printing)
 
@@ skipping 2567 matching lines @@
       'browser/ui/app_list/app_list_service_impl.h',
       'browser/ui/app_list/app_list_service_mac.h',
       'browser/ui/app_list/app_list_service_mac.mm',
       'browser/ui/app_list/app_list_shower_delegate.h',
       'browser/ui/app_list/app_list_syncable_service.cc',
       'browser/ui/app_list/app_list_syncable_service.h',
       'browser/ui/app_list/app_list_syncable_service_factory.cc',
       'browser/ui/app_list/app_list_syncable_service_factory.h',
       'browser/ui/app_list/app_list_view_delegate.cc',
       'browser/ui/app_list/app_list_view_delegate.h',
+      'browser/ui/app_list/chrome_app_list_item.cc',
+      'browser/ui/app_list/chrome_app_list_item.h',
       'browser/ui/app_list/extension_app_item.cc',
       'browser/ui/app_list/extension_app_item.h',
       'browser/ui/app_list/extension_app_model_builder.cc',
       'browser/ui/app_list/extension_app_model_builder.h',
       'browser/ui/app_list/extension_uninstaller.cc',
       'browser/ui/app_list/extension_uninstaller.h',
       'browser/ui/app_list/fast_show_pickler.cc',
       'browser/ui/app_list/fast_show_pickler.h',
       'browser/ui/app_list/google_now_extension.cc',
       'browser/ui/app_list/google_now_extension.h',
@@ skipping 718 matching lines @@
           ],
           'sources': [
             '<@(chrome_browser_ui_non_mobile_sources)',
             '<@(chrome_browser_ui_omnibox_non_mobile_sources)',
           ],
         }],
       ],
     },
   ],
 }