Roll Polymer to 1.3.1

third_party/polymer/v1_0/components-chromium/paper-tabs/paper-tabs-extracted.js

 Polymer({
       is: 'paper-tabs',
 
       behaviors: [
         Polymer.IronResizableBehavior,
         Polymer.IronMenubarBehavior
       ],
 
       properties: {
         /**
@@ skipping 48 matching lines @@
         },
 
         /**
          * If true, the tabs are aligned to bottom (the selection bar appears at the top).
          */
         alignBottom: {
           type: Boolean,
           value: false
         },
 
-        /**
-         * Gets or sets the selected element. The default is to use the index of the item.
-         */
-        selected: {
-          type: String,
-          notify: true
-        },
-
         selectable: {
           type: String,
           value: 'paper-tab'
         },
 
         _step: {
           type: Number,
           value: 10
         },
 
@@ skipping 181 matching lines @@
         }
 
         var oldRect = old.getBoundingClientRect();
         var oldIndex = this.items.indexOf(old);
         var index = this.items.indexOf(tab);
         var m = 5;
 
         // bar animation: expand
         this.$.selectionBar.classList.add('expand');
 
-        if (oldIndex < index) {
+        var moveRight = oldIndex < index;
+        var isRTL = this._isRTL;
+        if (isRTL) {
+          moveRight = !moveRight;
+        }
+
+        if (moveRight) {
           this._positionBar(this._calcPercent(tabRect.left + tabRect.width - oldRect.left, w) - m,
               this._left);
         } else {
           this._positionBar(this._calcPercent(oldRect.left + oldRect.width - tabRect.left, w) - m,
               this._calcPercent(tabOffsetLeft, w) + m);
         }
 
         if (this.scrollable) {
           this._scrollToSelectedIfNeeded(tabRect.width, tabOffsetLeft);
         }
@@ skipping 32 matching lines @@
         if (cl.contains('expand')) {
           cl.remove('expand');
           cl.add('contract');
           this._positionBar(this._pos.width, this._pos.left);
         // bar animation done
         } else if (cl.contains('contract')) {
           cl.remove('contract');
         }
       }
     });