Docserver: Make the hand-written Cron methods run first rather than last, since

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

Index: chrome/common/extensions/docs/server2/content_provider.py
diff --git a/chrome/common/extensions/docs/server2/content_provider.py b/chrome/common/extensions/docs/server2/content_provider.py
index df84c8ef68ab4d4e82fc2d7ca0824766d696e84a..cbd1da7613d94fccbe4366b769d61d9f54eb07df 100644
--- a/chrome/common/extensions/docs/server2/content_provider.py
+++ b/chrome/common/extensions/docs/server2/content_provider.py
@@ -84,5 +84,6 @@ class ContentProvider(object):
     return self._content_cache.GetFromFile(path, binary=True)
 
   def Cron(self):
-    # TODO(kalman): Implement.
-    pass
+    # TODO(kalman): Implement by walking over the whole filesystem and
+    # compiling all of the content.
+    return Future(value=())