Improve the instance-view page in observatory.

runtime/bin/vmservice/client/lib/src/elements/instance_view.dart

Index: runtime/bin/vmservice/client/lib/src/elements/instance_view.dart
diff --git a/runtime/bin/vmservice/client/lib/src/elements/instance_view.dart b/runtime/bin/vmservice/client/lib/src/elements/instance_view.dart
index faec9db8904ea7dfa8dd151685a9fa1d71e7d8ed..5a0f9ba068adef8187758a83d3735a1fe4bda5f4 100644
--- a/runtime/bin/vmservice/client/lib/src/elements/instance_view.dart
+++ b/runtime/bin/vmservice/client/lib/src/elements/instance_view.dart
@@ -8,8 +8,20 @@ import 'observatory_element.dart';
 import 'package:observatory/service.dart';
 import 'package:polymer/polymer.dart';
 
+import 'dart:async';
+
 @CustomTag('instance-view')
 class InstanceViewElement extends ObservatoryElement {
   @published ServiceMap instance;
+
   InstanceViewElement.created() : super.created();
+
+  Future<ServiceObject> eval(String text) {
+    return instance.isolate.get(
+        instance.id + "/eval?expr=${Uri.encodeComponent(text)}");
+  }
+
+  void refresh(var done) {
+    instance.reload().whenComplete(done);
+  }
 }