enterprise.platformKeys: Copy-on-read the 'algorithm' member of Key objects.

extensions/renderer/resources/utils.js

 // Copyright 2014 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.
 
 var createClassWrapper = requireNative('utils').createClassWrapper;
+var nativeDeepCopy = requireNative('utils').deepCopy;
 var schemaRegistry = requireNative('schema_registry');
 var CHECK = requireNative('logging').CHECK;
 var WARNING = requireNative('logging').WARNING;
 
 /**
  * An object forEach. Calls |f| with each (key, value) pair of |obj|, using
  * |self| as the target.
  * @param {Object} obj The object to iterate over.
  * @param {function} f The function to call in each iteration.
  * @param {Object} self The object to use as |this| in each function call.
@@ skipping 101 matching lines @@
         get: function() {
           return privates(this).impl[readonly];
         },
       });
     });
   }
 
   return publicClass;
 }
 
+/**
+ * Returns a deep copy of |value|. The copy will have no references to nested
+ * values of |value|.
+ */
+function deepCopy(value) {
+  return nativeDeepCopy(value);
+}
+
 exports.forEach = forEach;
 exports.loadTypeSchema = loadTypeSchema;
 exports.lookup = lookup;
 exports.expose = expose;
+exports.deepCopy = deepCopy;