Prepare declarativeContent API for new script injection feature. Added Javascript types and functio…

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 binding for the declarativeContent API.
 
 var binding = require('binding').Binding.create('declarativeContent');
 
 var utils = require('utils');
 var validate = require('schemaUtils').validate;
@@ skipping 42 matching lines @@
   // Setup all data types for the declarative content API.
   declarativeContent.PageStateMatcher = function(parameters) {
     setupInstance(this, parameters, 'PageStateMatcher');
     if ($Object.hasOwnProperty(this, 'css')) {
       canonicalizeCssSelectors(this.css);
     }
   };
   declarativeContent.ShowPageAction = function(parameters) {
     setupInstance(this, parameters, 'ShowPageAction');
   };
+  declarativeContent.RequestContentScript = function(parameters) {
+    setupInstance(this, parameters, 'RequestContentScript');
+  };
 });
 
 exports.binding = binding.generate();