Use getSourceReport for coverage/callsites in Observatory.

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

 <link rel="import" href="../../../../packages/polymer/polymer.html">
 <link rel="import" href="action_link.html">
 <link rel="import" href="curly_block.html">
 <link rel="import" href="eval_box.html">
 <link rel="import" href="function_ref.html">
 <link rel="import" href="isolate_summary.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">
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       }
       .miniProfileChart {
         width: 80%;
       }
     </style>
 
     <nav-bar>
       <top-nav-menu></top-nav-menu>
       <vm-nav-menu vm="{{ isolate.vm }}"></vm-nav-menu>
       <isolate-nav-menu isolate="{{ isolate }}" last="{{ true }}"></isolate-nav-menu>
-      <nav-refresh callback="{{ refreshCoverage }}" label="Refresh Coverage"></nav-refresh>
       <nav-refresh callback="{{ refresh }}"></nav-refresh>
     </nav-bar>
 
     <div class="content-centered">
       <h1>isolate '{{ isolate.name }}'</h1>
       <br>
       <div class="flex-row">
         <div style="flex:1"></div>
         <div>
           <isolate-run-state isolate="{{ isolate }}"></isolate-run-state>
@@ skipping 79 matching lines @@
       <hr>
       <script-inset script="{{ rootLibrary.rootScript }}">
       </script-inset>
     </div>
 
     <view-footer></view-footer>
   </template>
 </polymer-element>
 
 <script type="application/dart" src="isolate_view.dart"></script>