Implement reflecting on uninstantiated classes.

dart/sdk/lib/_internal/compiler/implementation/lib/js_helper.dart

Index: dart/sdk/lib/_internal/compiler/implementation/lib/js_helper.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/lib/js_helper.dart b/dart/sdk/lib/_internal/compiler/implementation/lib/js_helper.dart
index ab36275286da195ec31e8e5a5ba009c5dc01cc14..dfa503dd53f4e55d152235ea48af3804e23c870d 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/lib/js_helper.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/lib/js_helper.dart
@@ -570,11 +570,11 @@ class Primitives {
     // TODO(ahe): Generalize this and improve test coverage of
     // reflecting on intercepted classes.
     if (JS('bool', '# == "String"', className)) return const JSString();
-    if (JS('bool', '# == "int"', int)) return const JSInt();
-    if (JS('bool', '# == "double"', int)) return const JSDouble();
-    if (JS('bool', '# == "num"', int)) return const JSNumber();
-    if (JS('bool', '# == "bool"', int)) return const JSBool();
-    if (JS('bool', '# == "List"', int)) return const JSArray();
+    if (JS('bool', '# == "int"', className)) return const JSInt();
+    if (JS('bool', '# == "double"', className)) return const JSDouble();
+    if (JS('bool', '# == "num"', className)) return const JSNumber();
+    if (JS('bool', '# == "bool"', className)) return const JSBool();
+    if (JS('bool', '# == "List"', className)) return const JSArray();
     return JS('var', '#[#]', JS_CURRENT_ISOLATE(), className);
   }