Use getSourceReport for coverage/callsites in Observatory.

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

 <link rel="import" href="../../../../packages/polymer/polymer.html">
 <link rel="import" href="function_ref.html">
 <link rel="import" href="nav_bar.html">
 <link rel="import" href="eval_link.html">
 <link rel="import" href="observatory_element.html">
 <link rel="import" href="script_inset.html">
 <link rel="import" href="script_ref.html">
 
 <!-- TODO(turnidge): Use core-icon once core_elements work properly in
      devtools -->
@@ skipping 245 matching lines @@
       </a>
 
       <template if="{{expanded}}">
         <div class="frameDetails">
           <div class="flex-row-wrap">
             <div class="flex-item-script">
               <source-inset height="{{ scriptHeight }}"
                             location="{{ frame.function.location }}"
                             currentPos="{{ frame.location.tokenPos }}"
                             inDebuggerContext="{{ true }}"
+                            scroller="{{ scroller }}"
                             variables="{{ frame.variables }}">
               </source-inset>
             </div>
             <div class="flex-item-vars">
               <div style="padding-left:2em;" class="memberList">
                 <template repeat="{{ v in properLocals }}">
                   {{ v['name']}}&nbsp;:&nbsp;
                   <any-service-ref ref="{{ v['value'] }}"
                                    expandKey="{{ makeExpandKey(v['name']) }}"
                                    asValue="{{ true }}">
@@ skipping 189 matching lines @@
     <div class="container">
       <template if="{{ modalPrompt != null }}">
         <div class="modalPrompt">{{ modalPrompt }}</div>
       </template>
       <input id="textBox" class="textBox" type="text" value="{{ text }}" autofocus>
     </div>
   </template>
 </polymer-element>
 
 <script type="application/dart" src="debugger.dart"></script>