ShellUtil: Add generic methods to add/delete Windows file associations.

chrome/chrome_tests_unit.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': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 946 matching lines @@
         'browser/extensions/updater/extension_cache_fake.h',
         'browser/extensions/updater/extension_cache_fake.cc',
         'browser/extensions/updater/extension_updater_unittest.cc',
         'browser/extensions/user_script_listener_unittest.cc',
         'browser/extensions/user_script_loader_unittest.cc',
         'browser/extensions/webstore_inline_installer_unittest.cc',
         'browser/extensions/webstore_installer_unittest.cc',
         'browser/extensions/zipfile_installer_unittest.cc',
         'browser/external_protocol/external_protocol_handler_unittest.cc',
         'browser/favicon/favicon_handler_unittest.cc',
+        'browser/file_associations_win_unittest.cc',
         'browser/file_select_helper_unittest.cc',
         'browser/first_run/first_run_unittest.cc',
         'browser/font_family_cache_unittest.cc',
         'browser/geolocation/geolocation_permission_context_unittest.cc',
         'browser/global_keyboard_shortcuts_mac_unittest.mm',
         'browser/google/google_search_counter_android_unittest.cc',
         'browser/google/google_search_counter_unittest.cc',
         'browser/google/google_update_settings_unittest.cc',
         'browser/google/google_url_tracker_unittest.cc',
         'browser/history/android/android_cache_database_unittest.cc',
@@ skipping 1894 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }