Collect referenced classes recursively.

lib/compiler/implementation/dart_backend/backend.dart

Index: lib/compiler/implementation/dart_backend/backend.dart
diff --git a/lib/compiler/implementation/dart_backend/backend.dart b/lib/compiler/implementation/dart_backend/backend.dart
index a896995c3fefa1892d43c17421cce5ac131b485d..4569ff89aaa8ec21d39cfdb3bf551438a4d882fa 100644
--- a/lib/compiler/implementation/dart_backend/backend.dart
+++ b/lib/compiler/implementation/dart_backend/backend.dart
@@ -141,6 +141,12 @@ class ReferencedElementCollector extends AbstractVisitor {
       this.element, this.treeElements,
       this.typedefs, this.classes);
 
+  void collectElement(Element element) {

[Anton Muhin, 2012/08/13 08:15:30]

nit: please, do not shadow the field.

[Roman, 2012/08/13 08:23:08]

Renamed field to rootElement.

+    new ReferencedElementCollector(
+        compiler, element, new TreeElementMapping(), typedefs, classes)
+    .collect();
+  }
+
   visitNode(Node node) { node.visitChildren(this); }
 
   visitTypeAnnotation(TypeAnnotation typeAnnotation) {
@@ -148,11 +154,12 @@ class ReferencedElementCollector extends AbstractVisitor {
     Element typeElement = type.element;
     if (typeElement.isTypedef() && !typedefs.contains(typeElement)) {
       typedefs.add(typeElement);
-      new ReferencedElementCollector(
-          compiler, typeElement, new TreeElementMapping(), typedefs, classes)
-      .collect();
+      collectElement(typeElement);
+    }
+    if (typeElement.isClass() && !classes.contains(typeElement)) {
+      classes.add(typeElement);
+      collectElement(typeElement);
     }
-    if (typeElement.isClass()) classes.add(typeElement);
     typeAnnotation.visitChildren(this);
   }