Site Settings Desktop: Implement USB devices section.

chrome/browser/resources/settings/site_settings/usb_devices.js

+// Copyright 2016 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
+ * 'usb-devices' is the polymer element for showing the USB Devices category
+ * under Site Settings.
+ */
+
+Polymer({
+  is: 'usb-devices',
+
+  behaviors: [SiteSettingsBehavior],
+
+  properties: {
+    /**
+     * A list of all USB devices.
+     * @type {Array<UsbDeviceEntry>}
+     */
+    devices: Array,
+  },
+
+  ready: function() {
+    this.fetchUsbDevices_();
+  },
+
+  /**
+   * Fetch the list of USB devices and update the list.
+   * @private
+   */
+  fetchUsbDevices_: function() {
+    this.browserProxy.fetchUsbDevices().then(function(deviceList) {
+      this.devices = deviceList;
+    }.bind(this));
+  },
+
+  /**
+   * A handler when an action is selected in the action menu.
+   * @param {!{model: !{item: UsbDeviceEntry}}} event
+   * @private
+   */
+  onActionMenuIronActivate_: function(event) {
+    var item = event.model.item;
+    this.browserProxy.removeUsbDevice(
+        item.origin, item.embeddingOrigin, item.object);
+    this.fetchUsbDevices_();
+  },
+});