message: feat(aio): show developer survey 2019
  PR Close
diff: <mat-toolbar color="primary" class="app-toolbar no-print" [class.transitioning]="isTransitioning">
  <mat-toolbar-row class="notification-container">
  <aio-notification
  - notificationId="angular-v6-announcement"
  - expirationDate="2018-07-01"
  + notificationId="survey-february-2019"
  + expirationDate="2019-03-01"
  [dismissOnContentClick]="true"
  (dismissed)="notificationDismissed()">
  - <a href="https://blog.angular.io/version-6-0-0-of-angular-now-available-cc56b0efa7a4">
  + <a href="http://bit.ly/angular-survey-2019">
  <mat-icon class="icon" svgIcon="insert_comment" aria-label="Announcement"></mat-icon>
  - <span class="message">Version 6 of Angular Now Available!</span>
  - <span class="action-button">Learn More</span>
  + <span class="message">Help Angular by taking a <b>1 minute survey</b>!</span>
  + <span class="action-button">Go to survey</span>
  </a>
  </aio-notification>
  </mat-toolbar-row>
  