Canonicalize raw type

sdk/lib/_internal/compiler/implementation/mirrors/dart2js_mirror.dart

Index: sdk/lib/_internal/compiler/implementation/mirrors/dart2js_mirror.dart
diff --git a/sdk/lib/_internal/compiler/implementation/mirrors/dart2js_mirror.dart b/sdk/lib/_internal/compiler/implementation/mirrors/dart2js_mirror.dart
index 721c9adefdf187e63849b41d4086acb974fac1a4..a5ee505b4d90cce3f327f8730186ff0567fd1640 100644
--- a/sdk/lib/_internal/compiler/implementation/mirrors/dart2js_mirror.dart
+++ b/sdk/lib/_internal/compiler/implementation/mirrors/dart2js_mirror.dart
@@ -1171,11 +1171,13 @@ class Dart2JsInterfaceTypeMirror extends Dart2JsTypeElementMirror
   List<TypeMirror> get typeArguments {
     if (_typeArguments == null) {
       _typeArguments = <TypeMirror>[];

[ahe, 2012/11/29 10:09:08]

This list is not immutable.  Also, you can share a const empty array for the
common case: raw or non-generic.

-      Link<DartType> type = _interfaceType.typeArguments;
-      while (type != null && type.head != null) {
-        _typeArguments.add(_convertTypeToTypeMirror(mirrors, type.head,
-            mirrors.compiler.types.dynamicType));
-        type = type.tail;
+      if (!_interfaceType.isRaw) {
+        Link<DartType> type = _interfaceType.typeArguments;
+        while (type != null && type.head != null) {
+          _typeArguments.add(_convertTypeToTypeMirror(mirrors, type.head,
+              mirrors.compiler.types.dynamicType));
+          type = type.tail;
+        }
       }
     }
     return _typeArguments;