promise.jsm
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promise.jsm
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	/global Components: false /
	/*
	* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*/

	"use strict";

	/*
	This module is a shim module to make it easier to load
	Promise from the various potential sources
	*/

	var EXPORTED_SYMBOLS = ["Promise"];

	const Cu = Components.utils;

	var scope = {};

	try {
	Cu.import("resource://gre/modules/Promise.jsm", scope); // Gecko >= 25
	}
	catch (ex) {
	try {
	Cu.import("resource://gre/modules/commonjs/sdk/core/promise.js", scope); // Gecko 21 to 24}
	}
	catch (ex2) {
	Cu.import("resource://gre/modules/commonjs/promise/core.js", scope); // Gecko 17 to 20
	}
	}

	var Promise = scope.Promise;