Address static warnings in the service library and tests.

runtime/bin/vmservice/observatory/lib/src/service/object.dart

 // Copyright (c) 2014, 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 service;
 
 /// A [ServiceObject] is an object known to the VM service and is tied
 /// to an owning [Isolate].
 abstract class ServiceObject extends Observable {
   static int LexicalSortName(ServiceObject o1, ServiceObject o2) {
@@ skipping 1510 matching lines @@
   String get shortName => valueAsString != null ? valueAsString : 'a ${clazz.name}';
 
   String toString() => 'Instance($shortName)';
 }
 
 
 class Context extends ServiceObject {
   @observable Class clazz;
   @observable int size;
 
-  @observable ServiceObject parentContext;
-  @observable var length;
+  @observable var parentContext;
+  @observable int length;
   @observable var variables;
 
-  bool get isClosure => closureFunc != null;
-
   Context._empty(ServiceObjectOwner owner) : super._empty(owner);
 
   void _update(ObservableMap map, bool mapIsRef) {
     // Extract full properties.
     _upgradeCollection(map, isolate);
 
     size = map['size'];
     length = map['length'];
     parentContext = map['parent'];
 
     if (mapIsRef) {
       return;
     }
 
     clazz = map['class'];
     variables = map['variables'];
 
     // We are fully loaded.
     _loaded = true;
   }
 
-  String get shortName => valueAsString != null ? valueAsString : 'a ${clazz.name}';
-
   String toString() => 'Context($length)';
 }
 
 
 // TODO(koda): Sync this with VM.
 class FunctionKind {
   final String _strValue;
   FunctionKind._internal(this._strValue);
   toString() => _strValue;
   bool isFake() => [kCollected, kNative, kTag, kReused].contains(this);
@@ skipping 954 matching lines @@
     var v = list[i];
     if ((v is ObservableMap) && _isServiceMap(v)) {
       list[i] = owner.getFromMap(v);
     } else if (v is ObservableList) {
       _upgradeObservableList(v, owner);
     } else if (v is ObservableMap) {
       _upgradeObservableMap(v, owner);
     }
   }
 }