Converted Observatory nav-notify element

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

 <link rel="import" href="../../../../packages/polymer/polymer.html">
 <link rel="import" href="action_link.html">
 <link rel="import" href="cpu_profile.html">
 <link rel="import" href="eval_box.html">
 <link rel="import" href="eval_link.html">
 <link rel="import" href="field_ref.html">
 <link rel="import" href="function_ref.html">
 <link rel="import" href="instance_ref.html">
 <link rel="import" href="library_ref.html">
 <link rel="import" href="nav_bar.html">
-<link rel="import" href="observatory_element.html">
+
 <link rel="import" href="script_inset.html">
 <link rel="import" href="script_ref.html">
 
-<polymer-element name="class-view" extends="observatory-element">
+<polymer-element name="class-view">
   <template>
     <link rel="stylesheet" href="css/shared.css">
     <nav-bar>
       <top-nav-menu></top-nav-menu>
       <vm-nav-menu vm="{{ cls.isolate.vm }}"></vm-nav-menu>
       <isolate-nav-menu isolate="{{ cls.isolate }}"></isolate-nav-menu>
       <library-nav-menu library="{{ cls.library }}"></library-nav-menu>
       <class-nav-menu cls="{{ cls }}" last="{{ true }}"></class-nav-menu>
       <nav-refresh callback="{{ refreshAllocationProfile }}" label="Refresh Allocation Profile"></nav-refresh>
       <nav-refresh callback="{{ refresh }}"></nav-refresh>
@@ skipping 252 matching lines @@
       <hr>
       <source-inset location="{{ cls.location }}">
       </source-inset>
     </div>
 
     <view-footer></view-footer>
   </template>
 </polymer-element>
 
 <script type="application/dart" src="class_view.dart"></script>