add GCS support to docs server

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 0a140d045595df1ae7fe7fdb82df8ce7849e98e8..72d09295fe8ad0591efe6634229d2a3a949cdf60 100755
--- a/chrome/common/extensions/docs/server2/cron_servlet_test.py
+++ b/chrome/common/extensions/docs/server2/cron_servlet_test.py
@@ -20,6 +20,7 @@ from servlet import Request
 from test_branch_utility import TestBranchUtility
 from test_file_system import MoveTo, TestFileSystem
 from test_util import EnableLogging, ReadFile
+from gcs_file_system_provider import CloudStorageFileSystemProvider
 
 
 # NOTE(kalman): The ObjectStore created by the CronServlet is backed onto our
@@ -49,6 +50,9 @@ class _TestDelegate(CronServlet.Delegate):
   def CreateGithubFileSystemProvider(self, object_store_creator):
     return GithubFileSystemProvider.ForEmpty()
 
+  def CreateGCSFileSystemProvider(self, object_store_creator):
+    return CloudStorageFileSystemProvider.ForEmpty()
+
   def GetAppVersion(self):
     return self._app_version