text: var $CLJS = require("./cljs_env");
  var COMPILED = false;
  
  var goog=$CLJS.goog;
  
  goog.dependencies_.written["goog.fs.url.js"] = true;
  
  // Copyright 2015 The Closure Library Authors. All Rights Reserved.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //      http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS-IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  /**
   * @fileoverview Wrapper for URL and its createObjectUrl and revokeObjectUrl
   * methods that are part of the HTML5 File API.
   */
  
  goog.provide('goog.fs.url');
  
  
  /**
   * Creates a blob URL for a blob object.
   * Throws an error if the browser does not support Object Urls.
   *
   * @param {!Blob} blob The object for which to create the URL.
   * @return {string} The URL for the object.
   */
  goog.fs.url.createObjectUrl = function(blob) {
    return goog.fs.url.getUrlObject_().createObjectURL(blob);
  };
  
  
  /**
   * Revokes a URL created by {@link goog.fs.url.createObjectUrl}.
   * Throws an error if the browser does not support Object Urls.
   *
   * @param {string} url The URL to revoke.
   */
  goog.fs.url.revokeObjectUrl = function(url) {
    goog.fs.url.getUrlObject_().revokeObjectURL(url);
  };
  
  
  /**
   * @typedef {{createObjectURL: (function(!Blob): string),
   *            revokeObjectURL: function(string): void}}
   */
  goog.fs.url.UrlObject_;
  
  
  /**
   * Get the object that has the createObjectURL and revokeObjectURL functions for
   * this browser.
   *
   * @return {goog.fs.url.UrlObject_} The object for this browser.
   * @private
   */
  goog.fs.url.getUrlObject_ = function() {
    var urlObject = goog.fs.url.findUrlObject_();
    if (urlObject != null) {
      return urlObject;
    } else {
      throw Error('This browser doesn\'t seem to support blob URLs');
    }
  };
  
  
  /**
   * Finds the object that has the createObjectURL and revokeObjectURL functions
   * for this browser.
   *
   * @return {?goog.fs.url.UrlObject_} The object for this browser or null if the
   *     browser does not support Object Urls.
   * @private
   */
  goog.fs.url.findUrlObject_ = function() {
    // This is what the spec says to do
    // http://dev.w3.org/2006/webapi/FileAPI/#dfn-createObjectURL
    if (goog.isDef(goog.global.URL) &&
        goog.isDef(goog.global.URL.createObjectURL)) {
      return /** @type {goog.fs.url.UrlObject_} */ (goog.global.URL);
      // This is what Chrome does (as of 10.0.648.6 dev)
    } else if (
        goog.isDef(goog.global.webkitURL) &&
        goog.isDef(goog.global.webkitURL.createObjectURL)) {
      return /** @type {goog.fs.url.UrlObject_} */ (goog.global.webkitURL);
      // This is what the spec used to say to do
    } else if (goog.isDef(goog.global.createObjectURL)) {
      return /** @type {goog.fs.url.UrlObject_} */ (goog.global);
    } else {
      return null;
    }
  };
  
  
  /**
   * Checks whether this browser supports Object Urls. If not, calls to
   * createObjectUrl and revokeObjectUrl will result in an error.
   *
   * @return {boolean} True if this browser supports Object Urls.
   */
  goog.fs.url.browserSupportsObjectUrls = function() {
    return goog.fs.url.findUrlObject_() != null;
  };
  
  module.exports = goog.fs.url;
  