Docserver: Consolidate features caching and access.

chrome/common/extensions/docs/server2/manifest_features.py

 # Copyright 2013 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.
 
 '''
 Provides a Manifest Feature abstraction, similar to but more strict than the
 Feature schema (see feature_utility.py).
 
 Each Manifest Feature has a 'level' in addition to the keys defined in a
 Feature. 'level' can be 'required', 'only_one', 'recommended', or 'optional',
 indicating how an app or extension should define a manifest property. If 'level'
 is missing, 'optional' is assumed.
 '''
 
-import features_utility
-
-def CreateManifestFeatures(features_json, manifest_json, filter_platform=None):
-  '''Create a manifest features dictionary by normalizing |features_json| and
-  merging it with |manifest_json|. If filter_platform is 'app' or 'extension'
-  then irrelevant features will be removed.
-  '''
-  assert filter_platform in ['app', 'extension', None]
-  manifest_features = features_utility.MergedWith(
-      features_utility.Parse(features_json), manifest_json)
-
-  if filter_platform:
-    manifest_features = features_utility.Filtered(
-        manifest_features, filter_platform)
-
-  return manifest_features
-
-
 def ConvertDottedKeysToNested(features):
   '''Some Manifest Features are subordinate to others, such as app.background to
   app. Subordinate Features can be moved inside the parent Feature under the key
   'children'.
 
   Modifies |features|, a Manifest Features dictionary, by moving subordinate
   Features with names of the form 'parent.child' into the 'parent' Feature.
   Child features are renamed to the 'child' section of their previous name.
 
   Applied recursively so that children can be nested arbitrarily.
@@ skipping 10 matching lines @@
         value = features.pop(name)
         parent, child_name = name.split('.', 1)
         add_child(features, parent, child_name, value)
 
     for value in features.values():
       if 'children' in value:
         insert_children(value['children'])
 
   insert_children(features)
   return features