Support serialization of WorldImpact

pkg/compiler/lib/src/js_emitter/parameter_stub_generator.dart

 // Copyright (c) 2015, 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 ParameterStubGenerator {
   static final Set<Selector> emptySelectorSet = new Set<Selector>();
 
   final Namer namer;
@@ skipping 100 matching lines @@
               indexOfLastOptionalArgumentInParameters = count;
             }
             argumentsBuffer[count] = emitter.constantReference(value);
           }
         }
       }
       count++;
     });
 
     var body;  // List or jsAst.Statement.
-    if (backend.hasFixedBackendName(member)) {
+    if (backend.nativeData.hasFixedBackendName(member)) {
       body = emitterTask.nativeEmitter.generateParameterStubStatements(
           member, isInterceptedMethod, namer.invocationName(selector),
           parametersBuffer, argumentsBuffer,
           indexOfLastOptionalArgumentInParameters);
     } else if (member.isInstanceMember) {
       if (needsSuperGetter(member)) {
         ClassElement superClass = member.enclosingClass;
         jsAst.Name methodName = namer.instanceMethodName(member);
         // When redirecting, we must ensure that we don't end up in a subclass.
         // We thus can't just invoke `this.foo$1.call(filledInArguments)`.
@@ skipping 143 matching lines @@
             generateParameterStub(member, selector, null);
         if (stub != null) {
           stubs.add(stub);
         }
       }
     }
 
     return stubs;
   }
 }