cps-ir: Set runtime type information for new objects that require it.

pkg/compiler/lib/src/js_backend/codegen/js_tree_builder.dart

Index: pkg/compiler/lib/src/js_backend/codegen/js_tree_builder.dart
diff --git a/pkg/compiler/lib/src/js_backend/codegen/js_tree_builder.dart b/pkg/compiler/lib/src/js_backend/codegen/js_tree_builder.dart
index fcc772c7071b8c501b61d9f31a07e5d1a9907e23..8f043bf403811af7e5fb80954684fdc4e69a39aa 100644
--- a/pkg/compiler/lib/src/js_backend/codegen/js_tree_builder.dart
+++ b/pkg/compiler/lib/src/js_backend/codegen/js_tree_builder.dart
@@ -69,6 +69,9 @@ class JsTreeBuilder extends Builder {
   Expression visitCreateInstance(cps_ir.CreateInstance node) {
     return new CreateInstance(
         node.classElement,
-        node.arguments.map(getVariableUse).toList());
+        node.arguments.map(getVariableUse).toList(),
+        node.hasTypeInformation
+            ? node.typeInformation.map(getVariableUse).toList()
+            : null);
   }
 }