Final Observatory 1.5 fixes

runtime/bin/vmservice/client/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;
 
 abstract class LocationManager extends Observable {
   final _initialPath = '/vm';
   ObservatoryApplication _app;
 
@@ skipping 57 matching lines @@
     event.preventDefault();
   }
 
   /// Given an application url, generate a link.
   String makeLink(String url);
 }
 
 /// Uses location.hash to encode application urls.
 class HashLocationManager extends LocationManager {
   void _onStartup() {
-    String initialPath = '/${window.location.hash}';
+    String initialPath = '${window.location.hash}';
     if ((window.location.hash == '') || (window.location.hash == '#')) {
-      initialPath = '/#${_initialPath}';
+      initialPath = '#${_initialPath}';
     }
-    window.history.replaceState(initialPath, document.title, initialPath);
+    window.history.pushState(initialPath, document.title, initialPath);
     _go(window.location.hash);
   }
 
   void _onLocationChange(PopStateEvent _) {
     _go(window.location.hash);
   }
 
   /// Given an application url, generate a link for an anchor tag.
   String makeLink(String url) {
     return '#$url';
@@ skipping 15 matching lines @@
     _go(window.location.pathname);
   }
 
   void _onLocationChange(PopStateEvent _) {
     _go(window.location.pathname);
   }
 
   /// Given an application url, generate a link for an anchor tag.
   String makeLink(String url) => url;
 }