Added base template for config ui.

appengine/config_service/ui/bower_components/polymer/lib/mixins/mutable-data.html

Index: appengine/config_service/ui/bower_components/polymer/lib/mixins/mutable-data.html
diff --git a/appengine/config_service/ui/bower_components/polymer/lib/mixins/mutable-data.html b/appengine/config_service/ui/bower_components/polymer/lib/mixins/mutable-data.html
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+<!--
+@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="../utils/mixin.html">
+
+<script>
+(function() {
+  'use strict';
+
+  // Common implementation for mixin & behavior
+  function mutablePropertyChange(inst, property, value, old, mutableData) {
+    let isObject;
+    if (mutableData) {
+      isObject = (typeof value === 'object' && value !== null);
+      // Pull `old` for Objects from temp cache, but treat `null` as a primitive
+      if (isObject) {
+        old = inst.__dataTemp[property];
+      }
+    }
+    // Strict equality check, but return false for NaN===NaN
+    let shouldChange = (old !== value && (old === old || value === value));
+    // Objects are stored in temporary cache (cleared at end of
+    // turn), which is used for dirty-checking
+    if (isObject && shouldChange) {
+      inst.__dataTemp[property] = value;
+    }
+    return shouldChange;
+  }
+
+  /**
+   * Element class mixin to skip strict dirty-checking for objects and arrays
+   * (always consider them to be "dirty"), for use on elements utilizing
+   * `Polymer.PropertyEffects`
+   *
+   * By default, `Polymer.PropertyEffects` performs strict dirty checking on
+   * objects, which means that any deep modifications to an object or array will
+   * not be propagated unless "immutable" data patterns are used (i.e. all object
+   * references from the root to the mutation were changed).
+   *
+   * Polymer also provides a proprietary data mutation and path notification API
+   * (e.g. `notifyPath`, `set`, and array mutation API's) that allow efficient
+   * mutation and notification of deep changes in an object graph to all elements
+   * bound to the same object graph.
+   *
+   * In cases where neither immutable patterns nor the data mutation API can be
+   * used, applying this mixin will cause Polymer to skip dirty checking for
+   * objects and arrays (always consider them to be "dirty").  This allows a
+   * user to make a deep modification to a bound object graph, and then either
+   * simply re-set the object (e.g. `this.items = this.items`) or call `notifyPath`
+   * (e.g. `this.notifyPath('items')`) to update the tree.  Note that all
+   * elements that wish to be updated based on deep mutations must apply this
+   * mixin or otherwise skip strict dirty checking for objects/arrays.
+   *
+   * In order to make the dirty check strategy configurable, see
+   * `Polymer.OptionalMutableData`.
+   *
+   * Note, the performance characteristics of propagating large object graphs
+   * will be worse as opposed to using strict dirty checking with immutable
+   * patterns or Polymer's path notification API.
+   *
+   * @polymerMixin
+   * @memberof Polymer
+   * @summary Element class mixin to skip strict dirty-checking for objects
+   *   and arrays
+   */
+  Polymer.MutableData = Polymer.dedupingMixin(superClass => {
+
+    /**
+     * @polymerMixinClass
+     * @implements {Polymer_MutableData}
+     */
+    class MutableData extends superClass {
+      /**
+       * Overrides `Polymer.PropertyEffects` to provide option for skipping
+       * strict equality checking for Objects and Arrays.
+       *
+       * This method pulls the value to dirty check against from the `__dataTemp`
+       * cache (rather than the normal `__data` cache) for Objects.  Since the temp
+       * cache is cleared at the end of a turn, this implementation allows
+       * side-effects of deep object changes to be processed by re-setting the
+       * same object (using the temp cache as an in-turn backstop to prevent
+       * cycles due to 2-way notification).
+       *
+       * @param {string} property Property name
+       * @param {*} value New property value
+       * @param {*} old Previous property value
+       * @return {boolean} Whether the property should be considered a change
+       * @protected
+       */
+      _shouldPropertyChange(property, value, old) {
+        return mutablePropertyChange(this, property, value, old, true);
+      }
+
+    }
+
+    return MutableData;
+
+  });
+
+  /**
+   * Element class mixin to add the optional ability to skip strict
+   * dirty-checking for objects and arrays (always consider them to be
+   * "dirty") by setting a `mutable-data` attribute on an element instance.
+   *
+   * By default, `Polymer.PropertyEffects` performs strict dirty checking on
+   * objects, which means that any deep modifications to an object or array will
+   * not be propagated unless "immutable" data patterns are used (i.e. all object
+   * references from the root to the mutation were changed).
+   *
+   * Polymer also provides a proprietary data mutation and path notification API
+   * (e.g. `notifyPath`, `set`, and array mutation API's) that allow efficient
+   * mutation and notification of deep changes in an object graph to all elements
+   * bound to the same object graph.
+   *
+   * In cases where neither immutable patterns nor the data mutation API can be
+   * used, applying this mixin will allow Polymer to skip dirty checking for
+   * objects and arrays (always consider them to be "dirty").  This allows a
+   * user to make a deep modification to a bound object graph, and then either
+   * simply re-set the object (e.g. `this.items = this.items`) or call `notifyPath`
+   * (e.g. `this.notifyPath('items')`) to update the tree.  Note that all
+   * elements that wish to be updated based on deep mutations must apply this
+   * mixin or otherwise skip strict dirty checking for objects/arrays.
+   *
+   * While this mixin adds the ability to forgo Object/Array dirty checking,
+   * the `mutableData` flag defaults to false and must be set on the instance.
+   *
+   * Note, the performance characteristics of propagating large object graphs
+   * will be worse by relying on `mutableData: true` as opposed to using
+   * strict dirty checking with immutable patterns or Polymer's path notification
+   * API.
+   *
+   * @polymerMixin
+   * @memberof Polymer
+   * @summary Element class mixin to optionally skip strict dirty-checking
+   *   for objects and arrays
+   */
+  Polymer.OptionalMutableData = Polymer.dedupingMixin(superClass => {
+
+    /**
+     * @polymerMixinClass
+     * @implements {Polymer_OptionalMutableData}
+     */
+    class OptionalMutableData extends superClass {
+
+      static get properties() {
+        return {
+          /**
+           * Instance-level flag for configuring the dirty-checking strategy
+           * for this element.  When true, Objects and Arrays will skip dirty
+           * checking, otherwise strict equality checking will be used.
+           */
+          mutableData: Boolean
+        };
+      }
+
+      /**
+       * Overrides `Polymer.PropertyEffects` to provide option for skipping
+       * strict equality checking for Objects and Arrays.
+       *
+       * When `this.mutableData` is true on this instance, this method
+       * pulls the value to dirty check against from the `__dataTemp` cache
+       * (rather than the normal `__data` cache) for Objects.  Since the temp
+       * cache is cleared at the end of a turn, this implementation allows
+       * side-effects of deep object changes to be processed by re-setting the
+       * same object (using the temp cache as an in-turn backstop to prevent
+       * cycles due to 2-way notification).
+       *
+       * @param {string} property Property name
+       * @param {*} value New property value
+       * @param {*} old Previous property value
+       * @return {boolean} Whether the property should be considered a change
+       * @protected
+       */
+      _shouldPropertyChange(property, value, old) {
+        return mutablePropertyChange(this, property, value, old, this.mutableData);
+      }
+    }
+
+    return OptionalMutableData;
+
+  });
+
+  // Export for use by legacy behavior
+  Polymer.MutableData._mutablePropertyChange = mutablePropertyChange;
+
+})();
+</script>