Correct $ref links in extensions documentation server relative location.

chrome/common/extensions/docs/server2/intro_data_source.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 HTMLParser import HTMLParser
 import logging
 import os
 import re
 
 from data_source import DataSource
@@ skipping 32 matching lines @@
     self._cache = server_instance.compiled_fs_factory.Create(
         server_instance.host_file_system_provider.GetTrunk(),
         self._MakeIntro,
         IntroDataSource)
     self._ref_resolver = server_instance.ref_resolver_factory.Create()
 
   def _MakeIntro(self, intro_path, intro):
     # Guess the name of the API from the path to the intro.
     api_name = os.path.splitext(intro_path.split('/')[-1])[0]
     intro_with_links = self._ref_resolver.ResolveAllLinks(
-            intro, namespace=api_name)
+            intro, relative_to=self._request.path, namespace=api_name)
 
     # The templates generate a title for intros based on the API name.
     expect_title = '/intros/' not in intro_path
 
     # TODO(kalman): In order to pick up every header tag, and therefore make a
     # complete TOC, the render context of the Handlebar needs to be passed
     # through to here. Even if there were a mechanism to do this it would
     # break caching; we'd need to do the TOC parsing *after* rendering the full
     # template, and that would probably be expensive.
     parse_result = ParseDocument(
@@ skipping 42 matching lines @@
       except FileNotFoundError:
         continue
     # Not found. Do the first operation again so that we get a stack trace - we
     # know that it'll fail.
     get_from_base_path(base_paths[0])
     raise AssertionError()
 
   def Cron(self):
     # TODO(kalman): Walk through the intros and articles directory.
     return Future(value=())