Alternative fix for the js-interop crash.

pkg/compiler/lib/src/ssa/builder.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 ssa;
 
 class SsaFunctionCompiler implements FunctionCompiler {
   final SsaCodeGeneratorTask generator;
   final SsaBuilderTask builder;
   final SsaOptimizerTask optimizer;
@@ skipping 5920 matching lines @@
         argsStub.add('#');
       }
 
       if (element.isConstructor) {
         codeTemplate = js.js.parseForeignJS("new #(${argsStub.join(",")})");
       } else {
         codeTemplate = js.js.parseForeignJS("#(${argsStub.join(",")})");
       }
     }
 
+    DartType type = backend.helpers.jsJavaScriptObjectClass.thisType;
     var nativeBehavior = new native.NativeBehavior()
       ..codeTemplate = codeTemplate
-      ..typesReturned.add(
-          helpers.jsJavaScriptObjectClass.thisType)
-      ..typesInstantiated.add(
-          helpers.jsJavaScriptObjectClass.thisType)
+      ..typesReturned.add(type)
+      ..typesInstantiated.add(type)
       ..sideEffects.setAllSideEffects();
     return new HForeignCode(
         codeTemplate,
         backend.dynamicType, inputs,
         nativeBehavior: nativeBehavior)
       ..sourceInformation = sourceInformation;
   }
 
   void pushInvokeStatic(ast.Node location,
                         Element element,
@@ skipping 3204 matching lines @@
     if (unaliased is TypedefType) throw 'unable to unalias $type';
     unaliased.accept(this, builder);
   }
 
   void visitDynamicType(DynamicType type, SsaBuilder builder) {
     JavaScriptBackend backend = builder.compiler.backend;
     ClassElement cls = backend.helpers.DynamicRuntimeType;
     builder.push(new HDynamicType(type, new TypeMask.exact(cls, classWorld)));
   }
 }