Allow root level requests in the vm service.

runtime/bin/vmservice/client/deployed/web/index_devtools.html

Index: runtime/bin/vmservice/client/deployed/web/index_devtools.html
===================================================================
--- runtime/bin/vmservice/client/deployed/web/index_devtools.html	(revision 31848)
+++ runtime/bin/vmservice/client/deployed/web/index_devtools.html	(working copy)
@@ -345,6 +345,8 @@
         </li>
       </template>
       </ul>
+      (<a href="{{ app.locationManager.absoluteLink('cpu') }}">cpu</a>)
+      
   </template>
   
 </polymer-element><polymer-element name="instance-view" extends="observatory-element">
@@ -589,6 +591,9 @@
     <template if="{{ messageType == 'Script' }}">
       <script-view app="{{ app }}" script="{{ message }}"></script-view>
     </template>
+    <template if="{{ messageType == 'CPU' }}">
+      <json-view json="{{ message }}"></json-view>
+    </template>
     <!-- Add new views and message types in the future here. -->
   </template>