Docserver: Make the .html extension unnecessary for content pages, for example,

chrome/common/extensions/docs/server2/server_instance.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 api_categorizer import APICategorizer
 from api_data_source import APIDataSource
 from api_list_data_source import APIListDataSource
 from api_models import APIModels
 from availability_finder import AvailabilityFinder
 from compiled_file_system import CompiledFileSystem
@@ skipping 119 matching lines @@
         extension_samples_fs,
         app_samples_fs,
         CompiledFileSystem.Factory(object_store_creator),
         self.ref_resolver_factory,
         base_path)
 
     self.api_data_source_factory.SetSamplesDataSourceFactory(
         self.samples_data_source_factory)
 
     self.content_providers = ContentProviders(
+        object_store_creator,
         self.compiled_fs_factory,
         host_fs_at_trunk,
         self.github_file_system_provider,
         self.gcs_file_system_provider)
 
     # TODO(kalman): Move all the remaining DataSources into DataSourceRegistry,
     # then factor out the DataSource creation into a factory method, so that
     # the entire ServerInstance doesn't need to be passed in here.
     self.template_renderer = TemplateRenderer(self)
 
@@ skipping 33 matching lines @@
                                               store_type=TestObjectStore)
     host_file_system_provider = HostFileSystemProvider.ForLocal(
         object_store_creator)
     return ServerInstance(
         object_store_creator,
         CompiledFileSystem.Factory(object_store_creator),
         TestBranchUtility.CreateWithCannedData(),
         host_file_system_provider,
         GithubFileSystemProvider.ForEmpty(),
         CloudStorageFileSystemProvider(object_store_creator))