Docserver: Factor SamplesModel out of SamplesDataSource

chrome/common/extensions/docs/server2/compiled_file_system.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.
 
 import sys
 
 import schema_util
 from docs_server_utils import ToUnicode
 from file_system import FileNotFoundError
 from future import Future
-from path_util import AssertIsDirectory, AssertIsFile
+from path_util import AssertIsDirectory, AssertIsFile, ToDirectory
 from third_party.handlebar import Handlebar
 from third_party.json_schema_compiler import json_parse
 from third_party.json_schema_compiler.memoize import memoize
 
 
 _SINGLE_FILE_FUNCTIONS = set()
 
 
 def SingleFile(fn):
   '''A decorator which can be optionally applied to the compilation function
@@ skipping 207 matching lines @@
       return cache_data
     return self._RecursiveList(path).Then(next)
 
   def GetFileVersion(self, path):
     cache_entry = self._file_object_store.Get(path).Get()
     if cache_entry is not None:
       return cache_entry.version
     return self._file_system.Stat(path).version
 
   def GetFileListingVersion(self, path):
-    if not path.endswith('/'):
-      path += '/'
+    path = ToDirectory(path)
     cache_entry = self._list_object_store.Get(path).Get()
     if cache_entry is not None:
       return cache_entry.version
     return self._file_system.Stat(path).version
 
   def FileExists(self, path):
     return self._file_system.Exists(path)
 
   def GetIdentity(self):
     return self._file_system.GetIdentity()