title: google maps infoWindow button ( ionic ) issue
body: <p>Im traryng to do something like this on ionic</p>
  
  <p><a href="http://jsfiddle.net/doktormolle/8ZsSp/" rel="nofollow noreferrer">DEMO</a></p>
  
  <p>But i have a issue when i add a infoWindows button , 
  specifically in this section  <code>(click)="ir()"</code>  (angular)</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code> ir(){
      console.log("go");
    }
  
        addMarker(position,map,title){
          var marker = new google.maps.Marker({
            position,
            map,
            title
          });
  
          var infoWindow = new google.maps.InfoWindow({
            content:" "
          });
          
  
  
          marker.addListener('click',function(){
            infoWindow.setContent('&lt;h1&gt; '+ title +'&lt;/h1&gt;' +
                '&lt;button class="mapaboton" (click)="ir()"&gt;Ver Detalles&lt;/button&gt;'); 
              infoWindow.open(map,this);
          });
  
  
  
        }</code></pre>
  </div>
  </div>
  </p>
  
  <p>Sorry for my english </p>
  
  <p>when i click on it nothing happens.
  then i changed <code>(click)="ir()"</code> for <code>onclick="ir()"</code> and it throw me  the next error</p>
  
  <blockquote>
    <p>(index):1 Uncaught ReferenceError: ir is not defined
        at HTMLButtonElement.onclick ((index):1)</p>
  </blockquote>