Remove balloon notification code. The last user was the Linux GTK port but that's deleted now.

chrome/chrome_tests.gypi

 # Copyright 2013 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.
 {
   'includes': [
     'js_unittest_vars.gypi',
   ],
   'targets': [
     {
       'target_name': 'interactive_ui_tests',
@@ skipping 55 matching lines @@
         'browser/extensions/extension_crash_recovery_browsertest.cc',
         'browser/extensions/extension_fullscreen_apitest.cc',
         'browser/extensions/extension_function_test_utils.cc',
         'browser/extensions/extension_commands_global_registry_apitest.cc',
         'browser/extensions/extension_keybinding_apitest.cc',
         'browser/extensions/notifications_apitest.cc',
         'browser/extensions/updater/extension_cache_fake.h',
         'browser/extensions/updater/extension_cache_fake.cc',
         'browser/extensions/window_open_interactive_apitest.cc',
         'browser/mouseleave_browsertest.cc',
-        'browser/notifications/desktop_notifications_unittest.cc',
-        'browser/notifications/desktop_notifications_unittest.h',
         'browser/password_manager/password_generation_interactive_uitest.cc',
         'browser/renderer_context_menu/render_view_context_menu_browsertest_util.cc',
         'browser/renderer_context_menu/render_view_context_menu_browsertest_util.h',
         'browser/task_manager/task_manager_browsertest_util.cc',
         'browser/ui/app_list/app_list_service_interactive_uitest.cc',
         'browser/ui/app_list/app_list_service_mac_interactive_uitest.mm',
         'browser/ui/autofill/autofill_popup_controller_interactive_uitest.cc',
         'browser/ui/browser_focus_uitest.cc',
         'browser/ui/cocoa/panels/panel_cocoa_browsertest.mm',
         'browser/ui/find_bar/find_bar_host_interactive_uitest.cc',
@@ skipping 1230 matching lines @@
         'browser/ssl/ssl_client_certificate_selector_test.cc',
         'browser/ssl/ssl_client_certificate_selector_test.h',
         'browser/sync_file_system/mock_local_change_processor.cc',
         'browser/sync_file_system/mock_local_change_processor.h',
         'browser/sync_file_system/mock_remote_file_sync_service.cc',
         'browser/sync_file_system/mock_remote_file_sync_service.h',
         'browser/tab_contents/view_source_browsertest.cc',
         'browser/task_manager/task_manager_browsertest.cc',
         'browser/task_manager/task_manager_browsertest_util.cc',
         'browser/task_manager/task_manager_browsertest_util.h',
-        'browser/task_manager/task_manager_notification_browsertest.cc',
         'browser/themes/theme_service_browsertest.cc',
         'browser/translate/translate_browsertest.cc',
         'browser/translate/translate_manager_browsertest.cc',
         'browser/ui/app_list/app_list_controller_browsertest.cc',
         'browser/ui/app_list/search/people/people_provider_browsertest.cc',
         'browser/ui/app_list/search/webstore/webstore_provider_browsertest.cc',
         'browser/ui/ash/accelerator_commands_browsertest.cc',
         'browser/ui/ash/launcher/chrome_launcher_controller_browsertest.cc',
         'browser/ui/ash/launcher/launcher_favicon_loader_browsertest.cc',
         'browser/ui/ash/shelf_browsertest.cc',
@@ skipping 1630 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }