Support new malformed types semantics.

sdk/lib/_internal/compiler/implementation/elements/modelx.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library elements.modelx;
 
 import 'dart:collection' show LinkedHashMap;
 
 import 'elements.dart';
 import '../../compiler.dart' as api;
@@ skipping 302 matching lines @@
   isErroneous() => true;
 
   unsupported() {
     throw 'unsupported operation on erroneous element';
   }
 
   Link<MetadataAnnotation> get metadata => unsupported();
   get type => unsupported();
   get cachedNode => unsupported();
   get functionSignature => unsupported();
-  get patch => unsupported();
-  get origin => unsupported();
+  get patch => null;
+  get origin => this;
   get defaultImplementation => unsupported();
 
   bool get isRedirectingFactory => unsupported();
-  bool get isPatched => unsupported();
-  bool get isPatch => unsupported();
 
   setPatch(patch) => unsupported();
   computeSignature(compiler) => unsupported();
   requiredParameterCount(compiler) => unsupported();
   optionalParameterCount(compiler) => unsupported();
   parameterCount(compiler) => unsupported();
 
   // TODO(kasperl): These seem unnecessary.
   set patch(value) => unsupported();
   set origin(value) => unsupported();
@@ skipping 1867 matching lines @@
 
   MetadataAnnotation ensureResolved(Compiler compiler) {
     if (resolutionState == STATE_NOT_STARTED) {
       compiler.resolver.resolveMetadataAnnotation(this);
     }
     return this;
   }
 
   String toString() => 'MetadataAnnotation($value, $resolutionState)';
 }