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

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

 # Copyright (c) 2012 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 branch_utility import BranchUtility
 from cron_servlet import CronServlet
+from patch_servlet import PatchServlet
 from instance_servlet import InstanceServlet
 from servlet import Servlet, Request, Response
 
 _SERVLETS = {
   'cron': CronServlet,
+  'patch': PatchServlet,
 }
 _DEFAULT_SERVLET = InstanceServlet.GetConstructor()
 
 class Handler(Servlet):
   def Get(self):
     path = self._request.path
 
-    if path in ['favicon.ico', 'robots.txt']:
-      return Response.NotFound('')
-
     redirect = self._RedirectSpecialCases()
     if redirect is None:
       redirect = self._RedirectFromCodeDotGoogleDotCom()
     if redirect is not None:
       return redirect
 
     if path.startswith('_'):
       servlet_path = path[1:]
       if servlet_path.find('/') == -1:
         servlet_path += '/'
@@ skipping 31 matching lines @@
 
     new_path = path.split('/')
     if len(new_path) > 0 and new_path[0] == 'chrome':
       new_path.pop(0)
     for channel in BranchUtility.GetAllChannelNames():
       if channel in new_path:
         position = new_path.index(channel)
         new_path.pop(position)
         new_path.insert(0, channel)
     return Response.Redirect('/'.join([new_host] + new_path))