Update Polymer from 1.2.1 -> 1.2.3

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

 Polymer({
 
     is: 'paper-tabs',
 
     behaviors: [
       Polymer.IronResizableBehavior,
       Polymer.IronMenubarBehavior
     ],
 
     properties: {
@@ skipping 132 matching lines @@
       }
 
       if (hideThisButton) {
         return 'not-visible';
       }
 
       return '';
     },
 
     _computeTabsContentClass: function(scrollable) {
-      return scrollable ? 'scrollable' : 'horizontal layout';
+      return scrollable ? 'scrollable' : 'horizontal';
     },
 
     _computeSelectionBarClass: function(noBar, alignBottom) {
       if (noBar) {
         return 'hidden';
       } else if (alignBottom) {
         return 'align-bottom';
       }
     },
 
@@ skipping 157 matching lines @@
         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');
       }
     }
 
   });