Begin implementing a debugger page in Observatory.

runtime/bin/vmservice/observatory/lib/src/elements/service_view.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library service_object_view_element;
 
 import 'dart:html';
 import 'package:logging/logging.dart';
 import 'package:observatory/service.dart';
 import 'package:observatory/tracer.dart';
@@ skipping 130 matching lines @@
         return element;
       case 'ServiceException':
         ServiceExceptionViewElement element =
                     new Element.tag('service-exception-view');
         element.exception = object;
         return element;
       case 'Script':
         ScriptViewElement element = new Element.tag('script-view');
         element.script = object;
         return element;
-      case 'StackTrace':
-        StackTraceElement element = new Element.tag('stack-trace');
-        element.trace = object;
-        return element;
       case 'VM':
         VMViewElement element = new Element.tag('vm-view');
         element.vm = object;
         return element;
       default:
         if (object.isInstance ||
             object.isSentinel) {  // TODO(rmacnak): Separate this out.
           InstanceViewElement element = new Element.tag('instance-view');
           element.instance = object;
           return element;
@@ skipping 69 matching lines @@
 
   dynamic expander() {
     return expandEvent;
   }
 
   void expandEvent(bool exp, var done) {
     expand = exp;
     done();
   }
 }