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

third_party/polymer/v1_0/components/iron-overlay-behavior/iron-overlay-behavior.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
 -->
 
@@ skipping 43 matching lines @@
   Polymer.IronOverlayBehaviorImpl = {
 
     properties: {
 
       /**
        * True if the overlay is currently displayed.
        */
       opened: {
         observer: '_openedChanged',
         type: Boolean,
-        value: false
+        value: false,
+        notify: true
       },
 
       /**
        * True if the overlay was canceled when it was last closed.
        */
       canceled: {
         observer: '_canceledChanged',
         readOnly: true,
         type: Boolean,
         value: false
@@ skipping 287 matching lines @@
         this.backdropElement.complete();
       }
     },
 
     _preparePositioning: function() {
       this.style.transition = this.style.webkitTransition = 'none';
       this.style.transform = this.style.webkitTransform = 'none';
       this.style.display = '';
     },
 
-    _finishPositioning: function(target) {
+    _finishPositioning: function() {
       this.style.display = 'none';
       this.style.transform = this.style.webkitTransform = '';
       // force layout to avoid application of transform
       this.offsetWidth;
       this.style.transition = this.style.webkitTransition = '';
     },
 
     _applyFocus: function() {
       if (this.opened) {
         if (!this.noAutoFocus) {
@@ skipping 41 matching lines @@
       }
     }
 
   };
 
   /** @polymerBehavior */
   Polymer.IronOverlayBehavior = [Polymer.IronFitBehavior, Polymer.IronResizableBehavior, Polymer.IronOverlayBehaviorImpl];
 
 
 </script>