Update bower.json for Polymer elements and add PRESUBMIT.py

third_party/polymer/v1_0/components/iron-localstorage/iron-localstorage.html

-<!--
-@license
-Copyright (c) 2015 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="../polymer/polymer.html">
-
-<!--
-Element access to Web Storage API (window.localStorage).
-
-Keeps `value` in sync with a localStorage key.
-
-Direct assignments to `value` are automatically detected and saved.
-Subproperty assignments are not (ex: `value.bar='foo'`).
-Call `save()` manually to commit your changes after modifying subproperties.
-
-Value is saved in localStorage as JSON by default.
-
-If you set the value to null, storage key will be deleted.
-
-    <iron-localstorage name="my-app-storage" value="{{value}}">
-    </iron-localstorage>
-
-
-<b>Warning</b>: do not pass subproperty bindings to iron-localstorage until Polymer
-[bug 1550](https://github.com/Polymer/polymer/issues/1550)
-is resolved. Local storage will be blown away.
-No `<iron-localstorage value="{{foo.bar}}"`.
-
-@group Iron Elements
-@demo demo/index.html
-@hero hero.svg
-@element iron-localstorage
--->
-<dom-module id="iron-localstorage"></dom-module>
-<script>
-
-  Polymer({
-    is: 'iron-localstorage',
-
-    /**
-     * Fired when value loads from localStorage.
-     *
-     * @event paper-responsive-change
-     * @param {{externalChange: boolean}} detail -
-     *     externalChange: True if change occured in different window.
-     */
-
-    /**
-     * Fired when loaded value is null.
-     * You can use event handler to initialize default value.
-     *
-     * @event iron-localstorage-load-empty
-     */
-    properties: {
-      /**
-       * The key to the data stored in localStorage.
-       */
-      name: {
-        type: String,
-        value: ''
-      },
-      /**
-       * The data associated with this storage.
-       * If value is set to null, and storage is in useRaw mode, item will be deleted
-       * @type {*}
-       */
-      value: {
-        type: Object,
-        notify: true
-      },
-
-      /**
-       * Value is stored and retrieved without JSON parse if true
-       */
-      useRaw: {
-        type: Boolean,
-        value: false
-      },
-
-      /**
-       * Auto save is disabled if true. Default to false.
-       */
-      autoSaveDisabled: {
-        type: Boolean,
-        value: false
-      },
-      /**
-       * Last error encountered while saving/loading items. Null otherwise
-       */
-      errorMessage: {
-        type: String,
-        notify: true
-      },
-      /*
-       * True if value was loaded
-       */
-      _loaded: {
-        type: Boolean,
-        value: false
-      }
-    },
-
-    observers: [
-      'reload(name,useRaw)',
-      '_trySaveValue(value, _loaded, autoSaveDisabled)'
-    ],
-
-    ready: function() {
-      this._boundHandleStorage = this._handleStorage.bind(this);
-    },
-
-    attached: function() {
-      window.addEventListener('storage', this._boundHandleStorage);
-    },
-
-    detached: function() {
-      window.removeEventListener('storage', this._boundHandleStorage);
-    },
-
-    _handleStorage: function(ev) {
-      if (ev.key == this.name) {
-        this._load(true);
-      }
-    },
-
-    _trySaveValue: function(value, _loaded, autoSaveDisabled) {
-      if (this._justLoaded) { // guard against saving after _load()
-        this._justLoaded = false;
-        return;
-      }
-      if (_loaded && !autoSaveDisabled) {
-        this.save();
-      }
-    },
-
-    /**
-     * Loads the value again. Use if you modify
-     * localStorage using DOM calls, and want to
-     * keep this element in sync.
-     */
-    reload: function() {
-      this._load();
-    },
-
-    /**
-     * loads value from local storage
-     * @param {boolean=} externalChange true if loading changes from a different window
-     */
-    _load: function(externalChange) {
-      var v = window.localStorage.getItem(this.name);
-
-      if (v === null) {
-        this.fire('iron-localstorage-load-empty');
-      } else if (!this.useRaw) {
-        try {
-          v = JSON.parse(v);
-        } catch(x) {
-          this.errorMessage = "Could not parse local storage value";
-          console.error("could not parse local storage value", v);
-        }
-      }
-
-      this._justLoaded = true;
-      this._loaded = true;
-      this.value = v;
-      this.fire('iron-localstorage-load', { externalChange: externalChange});
-    },
-
-    /**
-     * Saves the value to localStorage. Call to save if autoSaveDisabled is set.
-     * If `value` is null, deletes localStorage.
-     */
-    save: function() {
-      var v = this.useRaw ? this.value : JSON.stringify(this.value);
-      try {
-        if (this.value === null) {
-          window.localStorage.removeItem(this.name);
-        } else {
-          window.localStorage.setItem(this.name, /** @type {string} */ (v));
-        }
-      }
-      catch(ex) {
-        // Happens in Safari incognito mode,
-        this.errorMessage = ex.message;
-        console.error("localStorage could not be saved. Safari incoginito mode?", ex);
-      }
-    }
-
-  });
-
-</script>