Allow script to request durable storage permission (chrome side)

chrome/chrome_browser.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': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 438 matching lines @@
       'browser/download/download_status_updater_win.cc',
       'browser/download/download_target_determiner.cc',
       'browser/download/download_target_determiner.h',
       'browser/download/download_target_determiner_delegate.h',
       'browser/download/download_target_info.h',
       'browser/download/download_ui_controller.cc',
       'browser/download/download_ui_controller.h',
       'browser/download/drag_download_item.h',
       'browser/download/save_package_file_picker.cc',
       'browser/download/save_package_file_picker.h',
+      'browser/durable_storage_permission_context.cc',
+      'browser/durable_storage_permission_context.h',
+      'browser/durable_storage_permission_context_factory.cc',
+      'browser/durable_storage_permission_context_factory.h',
+      'browser/durable_storage_permission_infobar_delegate.cc',
+      'browser/durable_storage_permission_infobar_delegate.h',
       'browser/enumerate_modules_model_win.cc',
       'browser/enumerate_modules_model_win.h',
       # Oh hey, all the cool browser/extensions files are hanging out in
       # chrome/chrome_browser_extensions.gypi.
       'browser/external_protocol/external_protocol_handler.cc',
       'browser/external_protocol/external_protocol_handler.h',
       'browser/external_protocol/external_protocol_observer.cc',
       'browser/external_protocol/external_protocol_observer.h',
       'browser/file_select_helper.cc',
       'browser/file_select_helper.h',
@@ skipping 3637 matching lines @@
             '../components/components.gyp:omnibox_browser',
             '../components/components.gyp:rlz',
             '../components/components.gyp:search_engines',
             '../rlz/rlz.gyp:rlz_lib',
           ],
         },
       ],
     }],
   ],
 }