Improve Dart Debugger performance and robustness by creating Dart wrappers using the standard SetNa…

LayoutTests/dart/inspector/scope-variables.dart

Index: LayoutTests/dart/inspector/scope-variables.dart
diff --git a/LayoutTests/dart/inspector/scope-variables.dart b/LayoutTests/dart/inspector/scope-variables.dart
index a36e27340545c8ed5126265a428b2342f9ce180f..0757638784fe642d7211dfa8022bfb49cbbafe13 100644
--- a/LayoutTests/dart/inspector/scope-variables.dart
+++ b/LayoutTests/dart/inspector/scope-variables.dart
@@ -34,6 +34,12 @@ class A {
 
 var globalVariable = 'globalString';
 
+var globalMapVariable = {'foo': 'bar', 'baz': 42};
+
+var globalArrayVariable = [3, 1, 4, 1, 5, 9];
+
 String get throwingGetter {
   throw 'only the best reviews';
 }
+
+html.DivElement get exampleDivGetter => html.query("#example_div");