Lazy load chrome.* APIs

chrome/renderer/resources/extensions/declarative_content_custom_bindings.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.
 
-// Custom bindings for the declarativeContent API.
+// Custom binding for the declarativeContent API.
 
-var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
+var binding = require('binding').Binding.create('declarativeContent');
+
 var utils = require('utils');
 var validate = require('schemaUtils').validate;
 
-chromeHidden.registerCustomHook('declarativeContent', function(api) {
+binding.registerCustomHook( function(api) {
+  var declarativeContent = api.compiledApi;
+
   // Returns the schema definition of type |typeId| defined in |namespace|.
-  function getSchema(namespace, typeId) {
-    var apiSchema = utils.lookup(api.apiDefinitions, 'namespace', namespace);
-    var resultSchema = utils.lookup(
-        apiSchema.types, 'id', namespace + '.' + typeId);
-    return resultSchema;
+  function getSchema(typeId) {
+    return utils.lookup(api.schema.types,
+                        'id',
+                        'declarativeContent.' + typeId);
   }
 
   // Helper function for the constructor of concrete datatypes of the
   // declarative content API.
   // Makes sure that |this| contains the union of parameters and
   // {'instanceType': 'declarativeContent.' + typeId} and validates the
   // generated union dictionary against the schema for |typeId|.
   function setupInstance(instance, parameters, typeId) {
     for (var key in parameters) {
       if (parameters.hasOwnProperty(key)) {
         instance[key] = parameters[key];
       }
     }
     instance.instanceType = 'declarativeContent.' + typeId;
-    var schema = getSchema('declarativeContent', typeId);
+    var schema = getSchema(typeId);
     validate([instance], [schema]);
   }
 
   // Setup all data types for the declarative content API.
-  chrome.declarativeContent.PageStateMatcher = function(parameters) {
+  declarativeContent.PageStateMatcher = function(parameters) {
     setupInstance(this, parameters, 'PageStateMatcher');
   };
-  chrome.declarativeContent.ShowPageAction = function(parameters) {
+  declarativeContent.ShowPageAction = function(parameters) {
     setupInstance(this, parameters, 'ShowPageAction');
   };
 });
+
+exports.binding = binding.generate();