Remove the old chrome://extensions page, since the URL now redirects to the new Settings page.BUG...

chrome/chrome_browser.gypi

 # Copyright (c) 2011 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',
       'type': 'static_library',
       'dependencies': [
@@ skipping 1123 matching lines @@
         'browser/extensions/extension_webrequest_api_constants.cc',
         'browser/extensions/extension_webrequest_api_constants.h',
         'browser/extensions/extension_webrequest_time_tracker.cc',
         'browser/extensions/extension_webrequest_time_tracker.h',
         'browser/extensions/extension_webstore_private_api.cc',
         'browser/extensions/extension_webstore_private_api.h',
         'browser/extensions/extensions_quota_service.cc',
         'browser/extensions/extensions_quota_service.h',
         'browser/extensions/extensions_startup.cc',
         'browser/extensions/extensions_startup.h',
-        'browser/extensions/extensions_ui.cc',
-        'browser/extensions/extensions_ui.h',
         'browser/extensions/external_extension_loader.cc',
         'browser/extensions/external_extension_loader.h',
         'browser/extensions/external_extension_provider_impl.cc',
         'browser/extensions/external_extension_provider_impl.h',
         'browser/extensions/external_extension_provider_interface.h',
         'browser/extensions/external_policy_extension_loader.cc',
         'browser/extensions/external_policy_extension_loader.h',
         'browser/extensions/external_pref_extension_loader.cc',
         'browser/extensions/external_pref_extension_loader.h',
         'browser/extensions/external_registry_extension_loader_win.cc',
@@ skipping 3909 matching lines @@
               # weak imports in dependents, who still must #include
               # closure_blocks_leopard_compat.h to get weak imports.
               'type': 'none',
             }],
           ],
         },
       ],
     }],
   ],
 }