Added base template for config ui.

appengine/config_service/ui/bower_components/shadycss/entrypoints/custom-style-interface.js

+/**
+@license
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+
+'use strict';
+
+import CustomStyleInterface from '../src/custom-style-interface.js'
+import {getComputedStyleValue, updateNativeProperties} from '../src/common-utils.js'
+import {nativeCssVariables, nativeShadow} from '../src/style-settings.js'
+
+const customStyleInterface = new CustomStyleInterface();
+
+if (!window.ShadyCSS) {
+  window.ShadyCSS = {
+    /**
+     * @param {HTMLTemplateElement} template
+     * @param {string} elementName
+     * @param {string=} elementExtends
+     */
+    prepareTemplate(template, elementName, elementExtends) {}, // eslint-disable-line no-unused-vars
+
+    /**
+     * @param {Element} element
+     * @param {Object=} properties
+     */
+    styleSubtree(element, properties) {
+      customStyleInterface.processStyles();
+      updateNativeProperties(element, properties);
+    },
+
+    /**
+     * @param {Element} element
+     */
+    styleElement(element) { // eslint-disable-line no-unused-vars
+      customStyleInterface.processStyles();
+    },
+
+    /**
+     * @param {Object=} properties
+     */
+    styleDocument(properties) {
+      customStyleInterface.processStyles();
+      updateNativeProperties(document.body, properties);
+    },
+
+    /**
+     * @param {Element} element
+     * @param {string} property
+     * @return {string}
+     */
+    getComputedStyleValue(element, property) {
+      return getComputedStyleValue(element, property);
+    },
+    nativeCss: nativeCssVariables,
+    nativeShadow: nativeShadow
+  }
+}
+
+window.ShadyCSS.CustomStyleInterface = customStyleInterface;