[Extensions] Finish freezing schema

extensions/renderer/resources/schema_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.
 
 // Routines used to validate and normalize arguments.
 // TODO(benwells): unit test this file.
 
 var JSONSchemaValidator = require('json_schema').JSONSchemaValidator;
 
 var schemaValidator = new JSONSchemaValidator();
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 // Example return value for chrome.windows.getCurrent:
 // "windows.getCurrent(optional object populate, function callback)"
 function getParameterSignatureString(name, definedSignature) {
   var getSchemaTypeString = function(schema) {
     var schemaTypes = schemaValidator.getAllTypesForSchema(schema);
     var typeName = schemaTypes.join(" or ") + " " + schema.name;
     if (schema.optional)
       return "optional " + typeName;
     return typeName;
   };
-  var typeNames = definedSignature.map(getSchemaTypeString);
+  var typeNames = $Array.map(definedSignature, getSchemaTypeString);
   return name + "(" + typeNames.join(", ") + ")";
 };
 
 // Returns a string representing a call to an API function.
 // Example return value for call: chrome.windows.get(1, callback) is:
 // "windows.get(int, function)"
 function getArgumentSignatureString(name, args) {
-  var typeNames = args.map(JSONSchemaValidator.getType);
+  var typeNames = $Array.map(args, JSONSchemaValidator.getType);
   return name + "(" + typeNames.join(", ") + ")";
 };
 
 // Finds the correct signature for the given arguments, then validates the
 // arguments against that signature. Returns a 'normalized' arguments list
 // where nulls are inserted where optional parameters were omitted.
 // |args| is expected to be an array.
 function normalizeArgumentsAndValidate(args, funDef) {
   if (funDef.allowAmbiguousOptionalArguments) {
     validate(args, funDef.definition.parameters);
@@ skipping 42 matching lines @@
         return true;
     }
   }
   return false;
 };
 
 exports.$set('isFunctionSignatureAmbiguous', isFunctionSignatureAmbiguous);
 exports.$set('normalizeArgumentsAndValidate', normalizeArgumentsAndValidate);
 exports.$set('schemaValidator', schemaValidator);
 exports.$set('validate', validate);