Remove support for 'argument definitions test' from dart2js.

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 320 matching lines @@
 
   // TODO(kasperl): These seem unnecessary.
   set patch(value) => unsupported();
   set origin(value) => unsupported();
   set defaultImplementation(value) => unsupported();
 
   get redirectionTarget => this;
 
   getLibrary() => enclosingElement.getLibrary();
 
+  computeTargetType(Compiler compiler, InterfaceType newType) => unsupported();
+
   String toString() {
     String n = name.slowToString();
     return '<$n: ${messageKind.message(messageArguments)}>';
   }
 }
 
 /**
  * An ambiguous element represents multiple elements accessible by the same name.
  *
  * Ambiguous elements are created during handling of import/export scopes. If an
@@ skipping 1850 matching lines @@
 
   MetadataAnnotation ensureResolved(Compiler compiler) {
     if (resolutionState == STATE_NOT_STARTED) {
       compiler.resolver.resolveMetadataAnnotation(this);
     }
     return this;
   }
 
   String toString() => 'MetadataAnnotation($value, $resolutionState)';
 }