Add missing registration of throwRuntimeError.

sdk/lib/_internal/compiler/implementation/resolution/members.dart

 // Copyright (c) 2012, 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.
 
 part of resolution;
 
 abstract class TreeElements {
   Element get currentElement;
   Set<Node> get superUses;
 
@@ skipping 1449 matching lines @@
 
     Element element = resolveTypeName(visitor.scope, prefixName, typeName);
     DartType type;
 
     DartType reportFailureAndCreateType(DualKind messageKind,
                                         Map messageArguments,
                                         {DartType userProvidedBadType}) {
       if (malformedIsError) {
         visitor.error(node, messageKind.error, messageArguments);
       } else {
+        compiler.backend.registerThrowRuntimeError(visitor.mapping);
         visitor.warning(node, messageKind.warning, messageArguments);
       }
       var erroneousElement = new ErroneousElementX(
           messageKind.error, messageArguments, typeName.source,
           visitor.enclosingElement);
       var arguments = new LinkBuilder<DartType>();
       resolveTypeArguments(visitor, node, null, arguments);
       return new MalformedType(erroneousElement,
               userProvidedBadType, arguments.toLink());
     }
@@ skipping 2606 matching lines @@
     return e;
   }
 
   /// Assumed to be called by [resolveRedirectingFactory].
   Element visitReturn(Return node) {
     Node expression = node.expression;
     return finishConstructorReference(visit(expression),
                                       expression, expression);
   }
 }