If the VM page fails to load, route to the VM connect page

runtime/observatory/lib/src/app/page.dart

Index: runtime/observatory/lib/src/app/page.dart
diff --git a/runtime/observatory/lib/src/app/page.dart b/runtime/observatory/lib/src/app/page.dart
index 21305e1a4cdfa7f48edb01311c62f541f863cb0a..6be5e884a099af6a7761ebbdd56520f2398f0cb7 100644
--- a/runtime/observatory/lib/src/app/page.dart
+++ b/runtime/observatory/lib/src/app/page.dart
@@ -122,6 +122,8 @@ class VMPage extends SimplePage {
       }
     }).catchError((e, stack) {
       Logger.root.severe('VMPage visit error: $e');
+      // Reroute to vm-connect.
+      app.locationManager.go(app.locationManager.makeLink('/vm-connect'));
     });
   }
 }