Removed polymer & mirror from Observatory

runtime/observatory/lib/src/app/location_manager.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.
 
 part of app;
 
-class LocationManager extends Observable {
+class LocationManager {
   final _defaultPath = '/vm';
 
   final ObservatoryApplication _app;
 
   /// [internalArguments] are parameters specified after a '---' in the
   /// application URL.
   final Map<String, String> internalArguments = new Map<String, String>();
 
   Uri _uri;
   /// [uri] is the application uri. Application uris consist of a path and
@@ skipping 149 matching lines @@
       // let browser handle.
       return;
     }
     event.preventDefault();
     // 'currentTarget' is the dom element that would process the event.
     // If we use 'target' we might get an <em> element or somesuch.
     var target = event.currentTarget;
     go(target.attributes['href']);
   }
 }