Allow Observatory debugger to switch isolates.

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

 <link rel="import" href="../../../../packages/polymer/polymer.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_ref.html">
 
 <polymer-element name="vm-view" extends="observatory-element">
   <template>
     <link rel="stylesheet" href="css/shared.css">
 
     <nav-bar>
       <top-nav-menu last="{{ true }}"></top-nav-menu>
       <nav-refresh callback="{{ refresh }}"></nav-refresh>
       <nav-control></nav-control>
     </nav-bar>
 
     <div class="content">
       <h1>VM</h1>
       <div class="memberList">
         <div class="memberItem">
           <div class="memberName">version</div>
           <div class="memberValue">{{ vm.version }}</div>
         </div>
         <div class="memberItem">
+          <div class="memberName">started at</div>
+          <div class="memberValue">{{ vm.startTime.toString() }}</div>
+        </div>
+        <div class="memberItem">
           <div class="memberName">uptime</div>
-          <div class="memberValue">{{ vm.uptime | formatTime }}</div>
+          <div class="memberValue">{{ vm.upTime.toString() }}</div>
+        </div>
+        <div class="memberItem">
+          <div class="memberName">refreshed at</div>
+          <div class="memberValue">{{ vm.refreshTime.toString() }}</div>
         </div>
         <div class="memberItem">
           <div class="memberName">type checks enabled</div>
           <div class="memberValue">{{ vm.typeChecksEnabled }}</div>
         </div>
         <div class="memberItem">
           <div class="memberName">asserts enabled</div>
           <div class="memberValue">{{ vm.assertsEnabled }}</div>
         </div>
         <div class="memberItem">
           <div class="memberName">pid</div>
           <div class="memberValue">{{ vm.pid }}</div>
         </div>
-        <div class="memberItem">
-          <div class="memberName">refreshed at</div>
-          <div class="memberValue">{{ vm.lastUpdate }}</div>
-        </div>
         <br>
         <div class="memberItem">
           <div class="memberValue">
             See <a on-click="{{ goto }}" _href="{{ gotoLink('/flags') }}">flags</a>
           </div>
         </div>
       </div>
     </div>
 
     <br>
     <hr>
 
     <ul class="list-group">
       <template repeat="{{ isolate in vm.isolates }}">
         <li class="list-group-item">
           <isolate-summary isolate="{{ isolate }}"></isolate-summary>
         </li>
         <hr>
       </template>
     </ul>
   </template>
 </polymer-element>
 
-<script type="application/dart" src="vm_view.dart"></script>
+<script type="application/dart" src="vm_view.dart"></script>