Converted Observatory context-view element

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

Index: runtime/observatory/lib/src/service/object.dart
diff --git a/runtime/observatory/lib/src/service/object.dart b/runtime/observatory/lib/src/service/object.dart
index fa01f834563552576c48b1f2bafae1f17cb4fdda..e0cd037b0e69b7a9012ec1cd141b12534bde8df3 100644
--- a/runtime/observatory/lib/src/service/object.dart
+++ b/runtime/observatory/lib/src/service/object.dart
@@ -2763,7 +2763,7 @@ class Instance extends HeapObject implements M.Instance {
 class Context extends HeapObject implements M.Context {
   @observable Context parentContext;
   @observable int length;
-  @observable var variables;
+  @observable Iterable<ContextElement> variables;
 
   Context._empty(ServiceObjectOwner owner) : super._empty(owner);
 
@@ -2779,7 +2779,8 @@ class Context extends HeapObject implements M.Context {
       return;
     }
 
-    variables = map['variables'];
+    variables = (map['variables'] ?? const []).map((element) =>
+      new ContextElement(element));
 
     // We are fully loaded.
     _loaded = true;
@@ -2788,6 +2789,13 @@ class Context extends HeapObject implements M.Context {
   String toString() => 'Context($length)';
 }
 
+class ContextElement extends M.ContextElement {
+  final Guarded<Instance> value;
+
+  ContextElement(ServiceMap map)
+    : value = new Guarded<Instance>(map['value']);
+}
+
 M.FunctionKind stringToFunctionKind(String value) {
   switch(value) {
     case 'RegularFunction': return M.FunctionKind.regular;