ent', function() {
          var constrain = fixture('constrain-target');
          var el = Polymer.dom(constrain).querySelector('.el')
          makeScrolling(el);
          el.fitInto = constrain;
          el.refit();
          var rect = el.getBoundingClientRect();
          var crect = constrain.getBoundingClientRect();
          assert.isTrue(rect.height <= crect.height, 'width is less than or equal to fitInto width');
          assert.isTrue(rect.height <= crect.height, 'height is less than or equal