Use assertSubtype for lists.

sdk/lib/_internal/compiler/implementation/js_backend/backend.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 js_backend;
 
 typedef void Recompile(Element element);
 
 class ReturnInfo {
   HType returnType;
@@ skipping 1671 matching lines @@
     } else if (Elements.isStringOnlySupertype(element, compiler)) {
       if (nativeCheck) {
         return typeCast
             ? const SourceString("stringSuperNativeTypeCast")
             : const SourceString('stringSuperNativeTypeCheck');
       } else {
         return typeCast
             ? const SourceString("stringSuperTypeCast")
             : const SourceString('stringSuperTypeCheck');
       }
-    } else if (element == compiler.listClass || element == jsArrayClass) {
+    } else if ((element == compiler.listClass || element == jsArrayClass) &&
+               type.isRaw) {
       if (nativeCheckOnly) return null;
       return typeCast
           ? const SourceString("listTypeCast")
           : const SourceString('listTypeCheck');
     } else {
       if (Elements.isListSupertype(element, compiler)) {
         if (nativeCheck) {
           return typeCast
               ? const SourceString("listSuperNativeTypeCast")
               : const SourceString('listSuperNativeTypeCheck');
@@ skipping 162 matching lines @@
   ClassElement get listImplementation => jsArrayClass;
   ClassElement get constListImplementation => jsArrayClass;
   ClassElement get fixedListImplementation => jsFixedArrayClass;
   ClassElement get growableListImplementation => jsExtendableArrayClass;
   ClassElement get mapImplementation => mapLiteralClass;
   ClassElement get constMapImplementation => constMapLiteralClass;
   ClassElement get typeImplementation => typeLiteralClass;
   ClassElement get boolImplementation => jsBoolClass;
   ClassElement get nullImplementation => jsNullClass;
 }