Abstract notification clicks in its own dictionary

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.
 {
   'variables': {
     'chrome_unit_tests_sources': [
       # histograms.xml is analyzed by AboutFlagsHistogramTest, so this
       # dependency is needed to make commit bots run unit_tests on
       # histograms.xml changes.
       '../tools/metrics/histograms/histograms.xml',
@@ skipping 1255 matching lines @@
       'browser/ui/cocoa/location_bar/autocomplete_text_field_unittest_helper.mm',
       'browser/ui/cocoa/location_bar/ev_bubble_decoration_unittest.mm',
       'browser/ui/cocoa/location_bar/image_decoration_unittest.mm',
       'browser/ui/cocoa/location_bar/keyword_hint_decoration_unittest.mm',
       'browser/ui/cocoa/location_bar/manage_passwords_decoration_unittest.mm',
       'browser/ui/cocoa/location_bar/selected_keyword_decoration_unittest.mm',
       'browser/ui/cocoa/location_bar/zoom_decoration_unittest.mm',
       'browser/ui/cocoa/media_picker/desktop_media_picker_controller_unittest.mm',
       'browser/ui/cocoa/menu_button_unittest.mm',
       'browser/ui/cocoa/notifications/notification_builder_mac_unittest.mm',
+      'browser/ui/cocoa/notifications/notification_response_builder_mac_unittest.mm',
       'browser/ui/cocoa/nsmenuitem_additions_unittest.mm',
       'browser/ui/cocoa/omnibox/omnibox_popup_cell_unittest.mm',
       'browser/ui/cocoa/omnibox/omnibox_popup_matrix_unittest.mm',
       'browser/ui/cocoa/omnibox/omnibox_popup_separator_view_unittest.mm',
       'browser/ui/cocoa/omnibox/omnibox_popup_view_mac_unittest.mm',
       'browser/ui/cocoa/omnibox/omnibox_view_mac_unittest.mm',
       'browser/ui/cocoa/panels/panel_cocoa_unittest.mm',
       'browser/ui/cocoa/passwords/account_chooser_view_controller_unittest.mm',
       'browser/ui/cocoa/passwords/autosignin_prompt_view_controller_unittest.mm',
       'browser/ui/cocoa/passwords/base_passwords_controller_test.h',
@@ skipping 1728 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }