Address observatory analysis issues.

runtime/observatory/lib/src/elements/debugger.dart

Index: runtime/observatory/lib/src/elements/debugger.dart
diff --git a/runtime/observatory/lib/src/elements/debugger.dart b/runtime/observatory/lib/src/elements/debugger.dart
index 0d14d06cd6f838fe80e5a4389b565bd93dd60f41..2cb465c8cb1c23b508e1f4e074ef15207802d205 100644
--- a/runtime/observatory/lib/src/elements/debugger.dart
+++ b/runtime/observatory/lib/src/elements/debugger.dart
@@ -5,14 +5,18 @@
 library debugger_page_element;
 
 import 'dart:async';
-import 'dart:svg';
 import 'dart:html';
 import 'dart:math';
-import 'package:observatory/event.dart';
-import 'package:observatory/models.dart' as M;
+import 'dart:svg';
+
+import 'package:logging/logging.dart';
 import 'package:observatory/app.dart';
 import 'package:observatory/cli.dart';
 import 'package:observatory/debugger.dart';
+import 'package:observatory/event.dart';
+import 'package:observatory/models.dart' as M;
+import 'package:observatory/service.dart' as S;
+import 'package:observatory/service_common.dart';
 import 'package:observatory/src/elements/function_ref.dart';
 import 'package:observatory/src/elements/helpers/any_ref.dart';
 import 'package:observatory/src/elements/helpers/nav_bar.dart';
@@ -27,8 +31,6 @@ import 'package:observatory/src/elements/nav/top_menu.dart';
 import 'package:observatory/src/elements/nav/vm_menu.dart';
 import 'package:observatory/src/elements/source_inset.dart';
 import 'package:observatory/src/elements/source_link.dart';
-import 'package:observatory/service.dart' as S;
-import 'package:logging/logging.dart';
 
 // TODO(turnidge): Move Debugger, DebuggerCommand to debugger library.
 abstract class DebuggerCommand extends Command {
@@ -1688,7 +1690,8 @@ class ObservatoryDebugger extends Debugger {
     switch (event.kind) {
       case S.ServiceEvent.kVMUpdate:
         var vm = event.owner;
-        console.print("VM ${vm.target.networkAddress} renamed to '${vm.name}'");
+        console.print(
+            "VM ${(vm as CommonWebSocketVM).target.networkAddress} renamed to '${vm.name}'");
         break;
 
       case S.ServiceEvent.kIsolateStart: