MD Settings: Add "Auto Open" setting to Downloads page UI.

chrome/browser/resources/settings/downloads_page/downloads_page.js

 // Copyright 2015 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.
 
 /**
  * @fileoverview
  * 'settings-downloads-page' is the settings page containing downloads
  * settings.
  *
  * Example:
  *
  *    <iron-animated-pages>
  *      <settings-downloads-page prefs="{{prefs}}">
  *      </settings-downloads-page>
  *      ... other pages ...
  *    </iron-animated-pages>
  */
 Polymer({
   is: 'settings-downloads-page',
 
+  behaviors: [WebUIListenerBehavior],
+
   properties: {
     /**
      * Preferences state.
      */
     prefs: {
       type: Object,
       notify: true,
     },
 
     /**
      * Dictionary defining page visibility.
      * @type {!DownloadsPageVisibility}
      */
     pageVisibility: Object,
+
+    /** @private */
+    autoOpenDownloads_: {
+      type: Boolean,
+      value: false,
+    },
+  },
+
+  /** @override */
+  attached: function() {
+    this.addWebUIListener('auto-open-downloads-changed', function(autoOpen) {
+      this.autoOpenDownloads_ = autoOpen;
+    }.bind(this));
+
+    chrome.send('initializeDownloads');

[Dan Beam, 2017/02/27 05:50:36]

don't chrome.send() directly

[tommycli, 2017/02/28 00:47:26]

Done.

   },
 
   /** @private */
   selectDownloadLocation_: function() {
     chrome.send('selectDownloadLocation');
   },
 
 // <if expr="chromeos">
   /**
    * @param {string} path
    * @return {string} The download location string that is suitable to display
    *     in the UI.
    * @private
    */
   getDownloadLocation_: function(path) {
     // Replace /special/drive-<hash>/root with "Google Drive" for remote files,
     // /home/chronos/user/Downloads or /home/chronos/u-<hash>/Downloads with
     // "Downloads" for local paths, and '/' with ' \u203a ' (angled quote sign)
     // everywhere. It is used only for display purpose.
     path = path.replace(/^\/special\/drive[^\/]*\/root/, 'Google Drive');
     path = path.replace(/^\/home\/chronos\/(user|u-[^\/]*)\//, '');
     path = path.replace(/\//g, ' \u203a ');
     return path;
   },
 // </if>
+
+  onClearAutoOpenFileTypesTap_: function() {
+    chrome.send('resetAutoOpenFileTypes');

[Dan Beam, 2017/02/27 05:50:36]

use a browser proxy

[tommycli, 2017/02/28 00:47:26]

Done.

+  },
 });