Service cleanups...

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

 <link rel="import" href="../../../../packages/polymer/polymer.html">
 <link rel="import" href="class_ref.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="observatory_element.html">
 <link rel="import" href="nav_bar.html">
 <link rel="import" href="object_common.html">
 <link rel="import" href="context_ref.html">
 <link rel="import" href="view_footer.html">
@@ skipping 29 matching lines @@
         </div>
       </div>
 
       <hr>
 
       <div class="content">
         <template if="{{ context.variables.isNotEmpty }}">
           variables ({{ context.variables.length }})
           <curly-block expand="{{ context.variables.length <= 8 }}">
             <div class="memberList">
-              <template repeat="{{ variable in context.variables }}">
+              <template repeat="{{ index in context.variables.asMap().keys }}">
                 <div class="memberItem">
-                  <div class="memberName">[{{ variable['index']}}]</div>
+                  <div class="memberName">[{{ index }}]</div>
                   <div class="memberValue">
-                    <any-service-ref ref="{{ variable['value'] }}"></any-service-ref>
+                    <any-service-ref
+                       ref="{{ context.variables[index]{'value'] }}">
+                    </any-service-ref>
                   </div>
                 </div>
               </template>
             </div>
           </curly-block><br><br>
         </template>
       </div>
     </template>
     <view-footer></view-footer>
   </template>
 </polymer-element>
 
 <script type="application/dart" src="context_view.dart"></script>