Do not navigate to vm-connect page upon disconnect

runtime/bin/vmservice/observatory/lib/src/app/location_manager.dart

Index: runtime/bin/vmservice/observatory/lib/src/app/location_manager.dart
diff --git a/runtime/bin/vmservice/observatory/lib/src/app/location_manager.dart b/runtime/bin/vmservice/observatory/lib/src/app/location_manager.dart
index 04b6d84bbf7f69a13984f2e8497871bd914440dc..0d7705bdda54ebc9682efce359c32bbfb3d655f1 100644
--- a/runtime/bin/vmservice/observatory/lib/src/app/location_manager.dart
+++ b/runtime/bin/vmservice/observatory/lib/src/app/location_manager.dart
@@ -33,6 +33,10 @@ abstract class LocationManager extends Observable {
   /// Go to a specific url.
   void go(String url) {
     if (_app.vm == null) {
+      if (!window.confirm('Connection with VM has been lost. '
+                          'Proceeding will lose current page.')) {
+        return;
+      }
       url = makeLink('/vm-connect/');

[turnidge, 2014/09/15 16:24:48]

Consider adding a notification.

[Cutch, 2014/09/15 18:11:20]

Done. I notify the user immediately on disconnect.

     }
     _pushUrl(url);