Lazily require types when validating Extensions API calls

chrome/renderer/resources/extensions/chrome_setting.js

+// 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.
+
+var chrome = requireNative('chrome').GetChrome();
+var sendRequest = require('sendRequest').sendRequest;
+var validate = require('schemaUtils').validate;
+
+function extendSchema(schema) {
+  var extendedSchema = schema.slice();
+  extendedSchema.unshift({'type': 'string'});
+  return extendedSchema;
+}
+
+function ChromeSetting(prefKey, valueSchema) {
+  this.get = function(details, callback) {
+    var getSchema = this.functionSchemas.get.definition.parameters;
+    validate([details, callback], getSchema);
+    return sendRequest('types.ChromeSetting.get',
+                       [prefKey, details, callback],
+                       extendSchema(getSchema));
+  };
+  this.set = function(details, callback) {
+    var setSchema = this.functionSchemas.set.definition.parameters.slice();
+    setSchema[0].properties.value = valueSchema;
+    validate([details, callback], setSchema);
+    return sendRequest('types.ChromeSetting.set',
+                       [prefKey, details, callback],
+                       extendSchema(setSchema));
+  };
+  this.clear = function(details, callback) {
+    var clearSchema = this.functionSchemas.clear.definition.parameters;
+    validate([details, callback], clearSchema);
+    return sendRequest('types.ChromeSetting.clear',
+                       [prefKey, details, callback],
+                       extendSchema(clearSchema));
+  };
+  this.onChange = new chrome.Event('types.ChromeSetting.' + prefKey +
+                                   '.onChange');
+};
+
+exports.ChromeSetting = ChromeSetting;