Docserver: Add support for viewing docs with a codereview patch applied

chrome/common/extensions/docs/server2/cron_servlet.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.
 
 import logging
 import time
 import traceback
 
 from app_yaml_helper import AppYamlHelper
 from appengine_wrappers import (
     GetAppVersion, DeadlineExceededError, IsDevServer, logservice)
 from branch_utility import BranchUtility
 from caching_file_system import CachingFileSystem
+from compiled_file_system import CompiledFileSystem
 from empty_dir_file_system import EmptyDirFileSystem
 from github_file_system import GithubFileSystem
 from object_store_creator import ObjectStoreCreator
 from render_servlet import RenderServlet
 from server_instance import ServerInstance
 from servlet import Servlet, Request, Response
 from subversion_file_system import SubversionFileSystem
 import svn_constants
 from third_party.json_schema_compiler.memoize import memoize
 
@@ skipping 196 matching lines @@
 
   def _CreateServerInstance(self, channel, revision):
     object_store_creator = self._CreateObjectStoreCreator(channel)
     host_file_system = CachingFileSystem(
         self._delegate.CreateHostFileSystemForBranchAndRevision(
             self._GetBranchForChannel(channel),
             revision),
         object_store_creator)
     app_samples_file_system = self._delegate.CreateAppSamplesFileSystem(
         object_store_creator)
+    compiled_host_fs_factory = CompiledFileSystem.Factory(
+        host_file_system,
+        object_store_creator)
     return ServerInstance(channel,
                           object_store_creator,
                           host_file_system,
-                          app_samples_file_system)
+                          app_samples_file_system,
+                          '/static' if channel == 'stable' else
+                              '/%s/static' % channel,
+                          compiled_host_fs_factory)