Docs: Memoize the FeaturesBundles that are created by AvailabilityFinder to

chrome/common/extensions/docs/server2/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 posixpath
 import traceback
 
 from future import Future
 from path_util import (
     AssertIsDirectory, AssertIsValid, IsDirectory, IsValid, SplitParent,
@@ skipping 153 matching lines @@
 
       yield root[len(basepath):].rstrip('/'), dirs, files
 
       for d in dirs:
         for walkinfo in walk(root + d):
           yield walkinfo
 
     for walkinfo in walk(root):
       yield walkinfo
 
+  def __eq__(self, other):
+    return (isinstance(other, FileSystem) and
+            self.GetIdentity() == other.GetIdentity())
+
+  def __ne__(self, other):
+    return not (self == other)
+
   def __repr__(self):
     return '<%s>' % type(self).__name__
 
   def __str__(self):
     return repr(self)