Allow building without notification support.

content/content_tests.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': 'test_support_content',
       'type': 'static_library',
       'defines!': ['CONTENT_IMPLEMENTATION'],
@@ skipping 190 matching lines @@
         'renderer/paint_aggregator_unittest.cc',
         'renderer/v8_value_converter_impl_unittest.cc',
         'test/run_all_unittests.cc',
       ],
       'conditions': [
         ['input_speech==0', {
           'sources/': [
             ['exclude', '^browser/speech/'],
           ]
         }],
+        ['notifications==0', {
+           'sources!': [
+             'renderer/active_notification_tracker_unittest.cc',
+           ],
+        }],
         ['use_x11 == 1', {
           'dependencies': [
             '../build/linux/system.gyp:dbus',
             '../dbus/dbus.gyp:dbus_test_support',
           ],
         }],
         ['os_posix!=1', {
           'sources!': [
             # TODO(port): port those unit tests.
             'common/process_watcher_unittest.cc',
@@ skipping 117 matching lines @@
           ],
           'sources': [
             'common/gpu/media/omx_video_decode_accelerator_unittest.cc',
           ],
         }
       ],
     },
    ],
   ],
 }