Docserver: SidenavDataSource refactor, transition to DataSourceRegistry

chrome/common/extensions/docs/server2/cron_servlet_test.py

Index: chrome/common/extensions/docs/server2/cron_servlet_test.py
diff --git a/chrome/common/extensions/docs/server2/cron_servlet_test.py b/chrome/common/extensions/docs/server2/cron_servlet_test.py
index 6188dbb5b13050e583657d285b80145f51d4c82e..67a42d893dc09999f8ff2ab901f44f8b5f0a3e47 100755
--- a/chrome/common/extensions/docs/server2/cron_servlet_test.py
+++ b/chrome/common/extensions/docs/server2/cron_servlet_test.py
@@ -103,7 +103,9 @@ class CronServletTest(unittest.TestCase):
           },
           'json': {
             'manifest.json': '{}',
-            'strings.json': '{}'
+            'strings.json': '{}',
+            'apps_sidenav.json': '{}',
+            'extensions_sidenav.json': '{}',
           },
         }
       }