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

third_party/polymer/v1_0/components-chromium/iron-a11y-announcer/iron-a11y-announcer-extracted.js

Index: third_party/polymer/v1_0/components-chromium/iron-a11y-announcer/iron-a11y-announcer-extracted.js
diff --git a/third_party/polymer/v1_0/components-chromium/iron-a11y-announcer/iron-a11y-announcer-extracted.js b/third_party/polymer/v1_0/components-chromium/iron-a11y-announcer/iron-a11y-announcer-extracted.js
deleted file mode 100644
index 28063d2fc6e683618753be6022fdb1e448cc6c1b..0000000000000000000000000000000000000000
--- a/third_party/polymer/v1_0/components-chromium/iron-a11y-announcer/iron-a11y-announcer-extracted.js
+++ /dev/null
@@ -1,65 +0,0 @@
-
-
-    (function() {
-      'use strict';
-
-      Polymer.IronA11yAnnouncer = Polymer({
-        is: 'iron-a11y-announcer',
-
-        properties: {
-
-          /**
-           * The value of mode is used to set the `aria-live` attribute
-           * for the element that will be announced. Valid values are: `off`,
-           * `polite` and `assertive`.
-           */
-          mode: {
-            type: String,
-            value: 'polite'
-          },
-
-          _text: {
-            type: String,
-            value: ''
-          }
-        },
-
-        created: function() {
-          if (!Polymer.IronA11yAnnouncer.instance) {
-            Polymer.IronA11yAnnouncer.instance = this;
-          }
-
-          document.body.addEventListener('iron-announce', this._onIronAnnounce.bind(this));
-        },
-
-        /**
-         * Cause a text string to be announced by screen readers.
-         *
-         * @param {string} text The text that should be announced.
-         */
-        announce: function(text) {
-          this._text = '';
-          this.async(function() {
-            this._text = text;
-          }, 100);
-        },
-
-        _onIronAnnounce: function(event) {
-          if (event.detail && event.detail.text) {
-            this.announce(event.detail.text);
-          }
-        }
-      });
-
-      Polymer.IronA11yAnnouncer.instance = null;
-
-      Polymer.IronA11yAnnouncer.requestAvailability = function() {
-        if (!Polymer.IronA11yAnnouncer.instance) {
-          document.createElement('iron-a11y-announcer');
-        }
-
-        document.body.appendChild(Polymer.IronA11yAnnouncer.instance);
-      };
-    })();
-
-