dart2dart: Fixed treatment of dynamic type literals in new IR.

sdk/lib/_internal/compiler/implementation/ir/const_expression.dart

Index: sdk/lib/_internal/compiler/implementation/ir/const_expression.dart
diff --git a/sdk/lib/_internal/compiler/implementation/ir/const_expression.dart b/sdk/lib/_internal/compiler/implementation/ir/const_expression.dart
index b375517d02f7cab8e2a5ef6d9b356fc749423b5d..f451e0f785f6d1322702e4fcc0c622940340328b 100644
--- a/sdk/lib/_internal/compiler/implementation/ir/const_expression.dart
+++ b/sdk/lib/_internal/compiler/implementation/ir/const_expression.dart
@@ -90,9 +90,12 @@ class SymbolConstExp extends ConstExp {
 
 /// Type literal.
 class TypeConstExp extends ConstExp {
-  final TypeDeclarationElement element;
+  /// Either [DynamicType] or a raw [GenericType].
+  final DartType type;
 
-  TypeConstExp(this.element);
+  TypeConstExp(this.type) {
+    assert(type is GenericType || type is DynamicType);
+  }
 
   accept(ConstExpVisitor visitor) => visitor.visitType(this);
 }