Support serialization of WorldImpact

pkg/compiler/lib/src/ssa/codegen.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.
 
 import '../common.dart';
 import '../common/codegen.dart' show
     CodegenRegistry,
     CodegenWorkItem;
 import '../common/tasks.dart' show
     CompilerTask;
@@ skipping 1580 matching lines @@
       } else if (target == helpers.jsStringSplit) {
         methodName = 'split';
         // Split returns a List, so we make sure the backend knows the
         // list class is instantiated.
         registry.registerInstantiatedClass(coreClasses.listClass);
       } else if (backend.isNative(target) && target.isFunction
                  && !node.isInterceptedCall) {
         // A direct (i.e. non-interceptor) native call is the result of
         // optimization.  The optimization ensures any type checks or
         // conversions have been satisified.
-        methodName = backend.getFixedBackendName(target);
+        methodName = backend.nativeData.getFixedBackendName(target);
       }
     }
 
     js.Name methodLiteral;
     if (methodName == null) {
       methodLiteral = backend.namer.invocationName(node.selector);
       registerMethodInvoke(node);
     } else {
       methodLiteral = backend.namer.asName(methodName);
     }
@@ skipping 1340 matching lines @@
         new StaticUse.staticInvoke(helper,
             new CallStructure.unnamed(argumentCount)));
     return backend.emitter.staticFunctionAccess(helper);
   }
 
   @override
   void visitRef(HRef node) {
     visit(node.value);
   }
 }