Small refactor of pages

runtime/observatory/lib/src/elements/observatory_application.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 observatory_application_element;
 
 import 'observatory_element.dart';
 import 'package:observatory/app.dart';
 import 'package:polymer/polymer.dart';
 
 /// Main application tag. Responsible for instantiating an instance of
 /// [ObservatoryApplication] which is passed declaratively to all child
 /// elements.
 @CustomTag('observatory-application')
 class ObservatoryApplicationElement extends ObservatoryElement {
-  @published bool devtools = false;
   @reflectable ObservatoryApplication app;
 
   ObservatoryApplicationElement.created() : super.created();
 
   @override
   void attached() {
     super.attached();
-    if (devtools) {
-      app = new ObservatoryApplication.devtools(this);
-    } else {
-      app = new ObservatoryApplication(this);
-    }
+    app = new ObservatoryApplication(this);
   }
 }