Improve class-tree, class-view, and instance-view.

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

Index: runtime/observatory/lib/src/elements/instance_view.dart
diff --git a/runtime/observatory/lib/src/elements/instance_view.dart b/runtime/observatory/lib/src/elements/instance_view.dart
index 96a3b746ceb3b74bf89921d54cb15e1ca44b4800..dda1cc5210d8a42ad6bc6bc2ce71a0b2edfb481b 100644
--- a/runtime/observatory/lib/src/elements/instance_view.dart
+++ b/runtime/observatory/lib/src/elements/instance_view.dart
@@ -15,6 +15,19 @@ class InstanceViewElement extends ObservatoryElement {
 
   InstanceViewElement.created() : super.created();
 
+  instanceChanged(oldValue) {
+    if (instance != null) {
+      // We load typeClass and typeArguments because we want to
+      // display this info.
+      if (instance.typeClass != null) {
+        instance.typeClass.load();
+      }
+      if (instance.typeArguments != null) {
+        instance.typeArguments.load();
+      }
+    }
+  }
+
   Future<ServiceObject> evaluate(String expression) {
     return instance.evaluate(expression);
   }