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  1. // Copyright 2014 The Chromium Authors. All rights reserved.
  2. // Use of this source code is governed by a BSD-style license that can be
  3. // found in the LICENSE file.
  4.  
  5. define('keep_alive', [
  6.     'content/public/renderer/service_provider',
  7.     'extensions/common/mojo/keep_alive.mojom',
  8.     'mojo/public/js/core',
  9. ], function(serviceProvider, mojom, core) {
  10.  
  11.   /**
  12.    * An object that keeps the background page alive until closed.
  13.    * @constructor
  14.    * @alias module:keep_alive~KeepAlive
  15.    */
  16.   function KeepAlive() {
  17.     /**
  18.      * The handle to the keep-alive object in the browser.
  19.      * @type {!MojoHandle}
  20.      * @private
  21.      */
  22.     this.handle_ = serviceProvider.connectToService(mojom.KeepAlive.name);
  23.   }
  24.  
  25.   /**
  26.    * Removes this keep-alive.
  27.    */
  28.   KeepAlive.prototype.close = function() {
  29.     core.close(this.handle_);
  30.   };
  31.  
  32.   var exports = {};
  33.  
  34.   return {
  35.     /**
  36.      * Creates a keep-alive.
  37.      * @return {!module:keep_alive~KeepAlive} A new keep-alive.
  38.      */
  39.     createKeepAlive: function() { return new KeepAlive(); }
  40.   };
  41. });
  42.