AngularJS - ui-gmap-window and expressions

angular.module('appMaps', ['uiGmapgoogle-maps'])
  .controller('mainCtrl', function($scope, uiGmapGoogleMapApi) {
    
      $scope.map = {
        center: {
          latitude: 51.5286416,
          longitude: -0.1015987
        },
        zoom: 12 };
        
      $scope.options = {scrollwheel: false};
      
      $scope.windowOpt = {
          position: {
              lat: 51.5286416,
              lng: -0.1015987
          },
          show: true
      }
      
      $scope.showWindow = function() {
        $scope.windowOpt.show = true;
      }
      
      $scope.doIt = function() {
        alert("Action!");
      }
      
      $scope.list = [
        {id: 1, content: "This is first item"},
        {id: 2, content: "This is second item"},
        {id: 3, content: "This is third item"}
      ]
  });

<!DOCTYPE html>
<html xmlns:ng="http://angularjs.org/" ng-app="appMaps">

<head>
  <meta charset="utf-8" />
  <title>AngularJS Plunker</title>
  <link rel="stylesheet" href="style.css" />
  <script src="https://code.angularjs.org/1.3.14/angular.js"></script>
  <script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.js"></script>
  <script src="http://rawgit.com/angular-ui/angular-google-maps/2.0.X/dist/angular-google-maps.js"></script>
  <script type='text/javascript' src='script.js'></script>

</head>

<body>
  <div id="map_canvas" ng-controller="mainCtrl">
    <ui-gmap-google-map bounds="map.bounds" center="map.center" zoom="map.zoom" options="options">
      <ui-gmap-window options="windowOpt" show="windowOpt.show" closeClick="closeWindow">
        <div class='map-popup'>
          <div><a ng-click='doIt()' href='#'>Action</a></div>
          <div ng-repeat="item in list">
            {{item.content}}
          </div>
        </div>
      </ui-gmap-window>
    </ui-gmap-google-map>
  </div>
  <!--example-->
</body>

</html>

 html,
    body,
    #map_canvas {
      height: 100%;
      width: 100%;
      margin: 0px;
    }
    
    #map_canvas {
      position: relative;
    }
    
    .angular-google-map-container {
      position: absolute;
      top: 0;
      bottom: 0;
      right: 0;
      left: 0;
    }