Add a Create method to DesktopNotificationHandler and stubs for the notification objects.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index f9ee59bb5820d1507d0ef6ca072122841ead9773..f07c364ff5d53068bd5e0c45b656d9f39befad8f 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -1451,11 +1451,6 @@
         'browser/net/sqlite_persistent_cookie_store_unittest.cc',
         'browser/net/url_fixer_upper_unittest.cc',
         'browser/net/url_info_unittest.cc',
-        'browser/notifications/desktop_notification_service_unittest.cc',
-        'browser/notifications/desktop_notifications_unittest.cc',
-        'browser/notifications/desktop_notifications_unittest.h',
-        'browser/notifications/notification_exceptions_table_model_unittest.cc',
-        'browser/notifications/notifications_prefs_cache_unittest.cc',
         'browser/parsers/metadata_parser_filebase_unittest.cc',
         'browser/password_manager/encryptor_password_mac_unittest.cc',
         'browser/password_manager/encryptor_unittest.cc',
@@ -1985,6 +1980,15 @@
         '../webkit/fileapi/file_system_test_helper.h',
       ],
       'conditions': [
+        ['enable_desktop_notifications==1', {
+          'sources': [
+            'browser/notifications/desktop_notification_service_unittest.cc',
+            'browser/notifications/desktop_notifications_unittest.cc',
+            'browser/notifications/desktop_notifications_unittest.h',
+            'browser/notifications/notification_exceptions_table_model_unittest.cc',
+            'browser/notifications/notifications_prefs_cache_unittest.cc',
+          ]
+        }],
         ['p2p_apis==1', {
           'sources': [
             '../content/browser/renderer_host/p2p/socket_host_test_utils.h',
@@ -2407,7 +2411,6 @@
         'browser/extensions/extension_webstore_private_apitest.cc',
         'browser/extensions/extension_webstore_private_browsertest.cc',
         'browser/extensions/isolated_app_apitest.cc',
-        'browser/extensions/notifications_apitest.cc',
         'browser/extensions/page_action_apitest.cc',
         'browser/extensions/permissions_apitest.cc',
         'browser/extensions/stubs_apitest.cc',
@@ -2653,6 +2656,12 @@
             '../webkit/webkit.gyp:copy_npapi_test_plugin',
           ],
         }],
+        ['enable_desktop_notifications==1', {
+          'sources': [
+            'browser/extensions/notifications_apitest.cc',
+            'browser/task_manager/task_manager_notification_browsertest.cc',
+          ]
+        }],
       ],  # conditions
     },  # target browser_tests
     {