MalformedType used for all invalid type annotations.

sdk/lib/_internal/compiler/implementation/dart_backend/placeholder_collector.dart

Index: sdk/lib/_internal/compiler/implementation/dart_backend/placeholder_collector.dart
diff --git a/sdk/lib/_internal/compiler/implementation/dart_backend/placeholder_collector.dart b/sdk/lib/_internal/compiler/implementation/dart_backend/placeholder_collector.dart
index 24859f4358a7b7a3c3f0cdab8da7715518357a2c..487736f354d45dc33eb25700f39dc092593c0c43 100644
--- a/sdk/lib/_internal/compiler/implementation/dart_backend/placeholder_collector.dart
+++ b/sdk/lib/_internal/compiler/implementation/dart_backend/placeholder_collector.dart
@@ -365,14 +365,7 @@ class PlaceholderCollector extends Visitor {
     Element constructor = treeElements[send];
     assert(constructor != null);
     assert(send.receiver == null);
-
-    // For constructors that refer to malformed class types retrieve
-    // class type like it is done in [ SsaBuilder.visitNewSend ].
-    if (type.kind == TypeKind.MALFORMED_TYPE) {
-      type = constructor.getEnclosingClass().thisType;
-    }
-
-    if (!Elements.isUnresolved(constructor)) {
+    if (!Elements.isErroneousElement(constructor)) {
       makeConstructorPlaceholder(node.send.selector, constructor, type);
       // TODO(smok): Should this be in visitNamedArgument?
       // Field names can be exposed as names of optional arguments, e.g.