Observatory UI tweaks.

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

 <link rel="import" href="../../../../packages/polymer/polymer.html">
 <link rel="import" href="class_ref.html">
 <link rel="import" href="error_view.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="inbound_reference.html">
 <link rel="import" href="instance_ref.html">
 <link rel="import" href="observatory_element.html">
@@ skipping 210 matching lines @@
             <div class="memberList">
               <template repeat="{{ index in instance.typedElements.asMap().keys }}">
                 <div class="memberItem">
                   <div class="memberName">[{{ index }}]</div>
                   <div class="memberValue">{{ instance.typedElements[index].toString() }}</div>
                 </div>
               </template>
             </div>
           </curly-block><br><br>
         </template>
+      </div>
 
+      <div class="content-centered-big">
+        <template if="{{ instance.isClosure }}">
+          <source-inset location="{{ instance.function.location }}"></source-inset>
+        </template>
       </div>
 
     </template>
     <view-footer></view-footer>
   </template>
 </polymer-element>
 
 <script type="application/dart" src="instance_view.dart"></script>