Refactoring of nav-notify

runtime/observatory/lib/src/elements/nav_bar.html

 <link rel="import" href="../../../../packages/polymer/polymer.html">
 <link rel="import" href="action_link.html">
 <link rel="import" href="observatory_element.html">
 
 <polymer-element name="nav-bar" extends="observatory-element">
   <template>
     <link rel="stylesheet" href="css/shared.css">
     <style>
       nav {
         position: fixed;
@@ skipping 15 matching lines @@
       nav ul:after {
         content: ""; clear: both; display: block;
       }
       .vertical-spacer {
         height: 40px;
         background-color: #0489c3;
       }
     </style>
     <nav>
       <ul>
-        <nav-notify notifications="{{ app.notifications }}"
-                    notifyOnPause="{{ notifyOnPause }}"></nav-notify>
         <content></content>
       </ul>
     </nav>
     <div class="vertical-spacer">
     </div>
     <template if="{{ pad }}">
       <br>
     </template>
   </template>
 </polymer-element>
@@ skipping 308 matching lines @@
         [<a class="link" on-click="{{ goto }}"
             _href="{{ gotoLink('vm-connect') }}">Connect to a different VM</a>]
         <a class="boxclose" on-click="{{ closeItem }}">&times;</a>
     </div>
     </template>
   </template>
 </polymer-element>
 
 
 <script type="application/dart" src="nav_bar.dart"></script>