Add UI components for license type selection in ChromeOS login UI.

chrome/browser/resources/chromeos/login/enrollment_license_card.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 Polymer element for displaying enrollment license selection
+ card.
+ */
+
+Polymer({
+  is: 'enrollment-license-card',
+
+  behaviors: [I18nBehavior],
+
+  properties: {
+    /**
+     * Whether the UI disabled.
+     */
+    disabled: {
+      type: Boolean,
+      value: true,
+    },
+
+    /**
+     * Selected license type
+     */
+    selected: {
+      type: String,
+      value: 'sometype',
+    },
+
+    /**
+     * Array with available license types.
+     */
+    licenses: {
+      type: Array,
+      value: function() {
+        return [
+          {
+            id: 'licenseType',
+            label: 'perpetualLicenseTypeTitle',
+            count: 123,
+            disabled: false,
+            hidden: false,
+          },
+        ];
+      },
+      observer: 'licensesChanged_',
+    },
+  },
+
+  get submitButton() {
+    return this.$.submitButton;
+  },
+
+  buttonClicked_: function() {
+    this.fire('buttonclick');
+  },
+
+  licensesChanged_: function(newValue, oldValue) {
+    var firstSelection = '';
+    for (var i = 0, item; item = this.licenses[i]; ++i) {
+      if (this.isSelectable_(item) && firstSelection == '') {
+        firstSelection = item.id;
+        break;
+      }
+    }
+    if (firstSelection != '') {
+      this.selected = firstSelection;
+    } else if (this.licenses[0]) {
+      this.selected = this.licenses[0].id;
+    } else {
+      this.selected = '';
+      this.disabled = true;
+    }
+  },
+
+  isSelectable_: function(item) {
+    return item.count > 0 && !item.disabled && !item.hidden;
+  },
+
+  formatTitle_: function(item) {
+    return this.i18n('licenseCountTemplate', this.i18n(item.label), item.count);
+  },
+
+  or_: function(left, right) {
+    return left || right;
+  },
+});