Extensions: Fix DocServer assert failures.

chrome/common/extensions/docs/server2/api_list_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 data_source import DataSource
 from future import Future
 from operator import itemgetter
 from platform_util import GetPlatforms
 
 from docs_server_utils import MarkFirstAndLast, MarkLast
@@ skipping 49 matching lines @@
       all_apis = []
       for api_name, api_model in self._platform_bundle.GetAPIModels(
           platform).IterModels():
         if not self._platform_bundle.GetAPICategorizer(platform).IsDocumented(
             api_name):
           continue
         api = {
           'name': api_name,
           'description': api_model.description,
         }
+
         category = self._platform_bundle.GetAPICategorizer(
             platform).GetCategory(api_name)
         if category == 'chrome':
           channel_info = self._platform_bundle.GetAvailabilityFinder(
               platform).GetAPIAvailability(api_name).channel_info
           channel = channel_info.channel
           if channel == 'stable':
             version = channel_info.version
             api['version'] = version
           platform_dict[category][channel].append(api)
@@ skipping 34 matching lines @@
       if data is None:
         return self._GenerateAPIDict().Then(persist_and_return)
       return data
     return self._object_store.Get('api_data').Then(return_or_generate)
 
   def get(self, key):
     return self._GetCachedAPIData().Get().get(key)
 
   def Refresh(self):
     return self._GetCachedAPIData()