title: md-chips with ngMessage
body: <p>I'm trying to use ngMessages with md-chips angular materials component, but I don't find nothing about it. I've tried this solution, but didn't work,</p>
  
  <pre><code>         &lt;md-input-container md-theme="hs-green" flex set-chips-validity&gt;
            &lt;label class="label"&gt;Anno&lt;/label&gt;
  
            &lt;md-chips name="yearInput" required ng-model="vm.offer.year"&gt;
  
              &lt;md-chip-template&gt;
                &lt;span&gt;{{$chip}}&lt;/span&gt;
              &lt;/md-chip-template&gt;
  
            &lt;/md-chips&gt;
  
            &lt;div data-ng-messages="insertOfferDetailsForm.yearInput.$error" data-ng-show="insertOfferDetailsForm.yearInput.$dirty"&gt;
              &lt;div data-ng-message="required"&gt;&lt;span translate="ERROR.FIELD.MANDATORY"&gt;&lt;/span&gt;&lt;/div&gt;
            &lt;/div&gt;
  
          &lt;/md-input-container&gt;
  </code></pre>
  
  <p>Help me, please :)</p>