Added base template for config ui.

appengine/config_service/ui/bower_components/polymer/lib/utils/flush.html

+<!--
+@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
+-->
+<link rel="import" href="boot.html">
+<script>
+(function() {
+  'use strict';
+
+  let debouncerQueue = [];
+
+  /**
+   * Adds a `Polymer.Debouncer` to a list of globally flushable tasks.
+   *
+   * @memberof Polymer
+   * @param {Polymer.Debouncer} debouncer Debouncer to enqueue
+   */
+  Polymer.enqueueDebouncer = function(debouncer) {
+    debouncerQueue.push(debouncer);
+  }
+
+  function flushDebouncers() {
+    const didFlush = Boolean(debouncerQueue.length);
+    while (debouncerQueue.length) {
+      try {
+        debouncerQueue.shift().flush();
+      } catch(e) {
+        setTimeout(() => {
+          throw e;
+        });
+      }
+    }
+    return didFlush;
+  }
+
+  /**
+   * Forces several classes of asynchronously queued tasks to flush:
+   * - Debouncers added via `enqueueDebouncer`
+   * - ShadyDOM distribution
+   *
+   * @memberof Polymer
+   */
+  Polymer.flush = function() {
+    let shadyDOM, debouncers;
+    do {
+      shadyDOM = window.ShadyDOM && ShadyDOM.flush();
+      if (window.ShadyCSS && window.ShadyCSS.ScopingShim) {
+        window.ShadyCSS.ScopingShim.flush();
+      }
+      debouncers = flushDebouncers();
+    } while (shadyDOM || debouncers);
+  }
+
+})();
+</script>