Provide a logical view of VM-internal maps in Observatory.

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

Index: runtime/observatory/lib/src/elements/class_view.dart
diff --git a/runtime/observatory/lib/src/elements/class_view.dart b/runtime/observatory/lib/src/elements/class_view.dart
index a7cdf07b6b633e2453646f96866f594fab0a4705..d839614fa7afbc647dcd35d11e46bfa45303ee46 100644
--- a/runtime/observatory/lib/src/elements/class_view.dart
+++ b/runtime/observatory/lib/src/elements/class_view.dart
@@ -45,7 +45,7 @@ class ClassViewElement extends ObservatoryElement {
   }
 
   void attached() {
-    library.variables.forEach((variable) => variable.reload());
+    cls.fields.forEach((field) => field.reload());
   }
 
   Future refresh() {
@@ -54,7 +54,7 @@ class ClassViewElement extends ObservatoryElement {
     mostRetained = null;
     var loads = [];
     loads.add(cls.reload());
-    cls.variables.forEach((variable) => loads.add(variable.reload()));
+    cls.fields.forEach((field) => loads.add(field.reload()));
     return Future.wait(loads);
   }