Devserver: run the cron over the examples.

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

 # Copyright 2013 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.
 
 from file_system import FileSystem, FileNotFoundError
 
 class OfflineFileSystem(FileSystem):
   '''An offline FileSystem which masquerades as another file system. It throws
   FileNotFound error for all operations, and overrides GetName and GetVersion.
   '''
   def __init__(self, cls):
     self._cls = cls
 
   def Read(self, paths, binary=False):
-    raise FileNotFoundError(paths)
+    raise FileNotFoundError('File system is offline, cannot read %s' % paths)
 
   def Stat(self, path):
-    raise FileNotFoundError(path)
+    raise FileNotFoundError('File system is offline, cannot read %s' % path)
 
   # HACK: despite GetName/GetVersion being @classmethods, these need to be
   # instance methods so that we can grab the name and version from the class
   # given on construction.
 
   def GetName(self):
     return self._cls.GetName()
 
   def GetVersion(self):
     return self._cls.GetVersion()