dart2js: remove (broken) support for nsm on native classes.

pkg/compiler/lib/src/js_emitter/old_emitter/class_emitter.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.
 
 part of dart2js.js_emitter;
 
 class ClassEmitter extends CodeEmitterHelper {
 
   ClassStubGenerator get _stubGenerator =>
       new ClassStubGenerator(compiler, namer, backend);
@@ skipping 231 matching lines @@
       assert(invariant(classElement, method.element.isInstanceMember));
       emitter.containerBuilder.addMemberMethod(method, builder);
     }
 
     if (identical(classElement, compiler.objectClass)
         && compiler.enabledNoSuchMethod) {
       // Emit the noSuchMethod handlers on the Object prototype now,
       // so that the code in the dynamicFunction helper can find
       // them. Note that this helper is invoked before analyzing the
       // full JS script.
-      if (!emitter.nativeEmitter.handleNoSuchMethod) {
-        emitter.nsmEmitter.emitNoSuchMethodHandlers(builder.addProperty);
-      }
+      emitter.nsmEmitter.emitNoSuchMethodHandlers(builder.addProperty);
     }
   }
 
   /// Emits the members from the model.
   void emitRuntimeTypeInformation(Class cls, ClassBuilder builder) {
     assert(builder.functionType == null);
     if (cls.functionTypeIndex != null) {
       builder.functionType = '${cls.functionTypeIndex}';
     }
 
@@ skipping 323 matching lines @@
               js.number(index));
     }
     jsAst.Expression convertRtiToRuntimeType = emitter
         .staticFunctionAccess(backend.findHelper('convertRtiToRuntimeType'));
     compiler.dumpInfoTask.registerElementAst(element,
         builder.addProperty(name,
             js('function () { return #(#) }',
                 [convertRtiToRuntimeType, computeTypeVariable])));
   }
 }