title: How to make placeholder work in md-autocomplete with floating label?
body: <p>So, I have md-autocomplete with floating label from <a href="https://material.angularjs.org/latest/demo/autocomplete" rel="nofollow noreferrer">Angular Material</a>, but I want placeholder instead of floating label. Unfortunately md-autocomplete without md-floating-label can't handle ng-messages, so I have to use it. I hide label with this piece of code:</p>
  
  <pre><code>.hide-label label {
    visibility: hidden;
  }
  </code></pre>
  
  <p>but, placeholder still hidden for some reason. Is there a way to make it work altogether?</p>
  
  <p>EDIT2: There's <a href="http://plnkr.co/edit/NnTYEIWLa409OLPPCKhe" rel="nofollow noreferrer">plunker</a></p>