Support serialization of WorldImpact

pkg/compiler/lib/src/js_backend/js_interop_analysis.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.
 
 /// Analysis to determine how to generate code for typed JavaScript interop.
 library compiler.src.js_backend.js_interop_analysis;
 
 import '../diagnostics/messages.dart' show MessageKind;
 import '../constants/values.dart'
     show
@@ skipping 52 matching lines @@
   void processJsInteropAnnotation(Element e) {
     for (MetadataAnnotation annotation in e.implementation.metadata) {
       ConstantValue constant = backend.compiler.constants.getConstantValue(
           annotation.constant);
       if (constant == null || constant is! ConstructedConstantValue) continue;
       ConstructedConstantValue constructedConstant = constant;
       if (constructedConstant.type.element == helpers.jsAnnotationClass) {
         ConstantValue value = constructedConstant.fields[nameField];
         if (value.isString) {
           StringConstantValue stringValue = value;
-          backend.setJsInteropName(
+          backend.nativeData.setJsInteropName(
               e, stringValue.primitiveValue.slowToString());
         } else {
           // TODO(jacobr): report a warning if the value is not a String.
-          backend.setJsInteropName(e, '');
+          backend.nativeData.setJsInteropName(e, '');
         }
         enabledJsInterop = true;
         return;
       }
     }
   }
 
   bool hasAnonymousAnnotation(Element element) {
     if (backend.helpers.jsAnonymousClass == null) return false;
     return element.metadata.any((MetadataAnnotation annotation) {
@@ skipping 98 matching lines @@
           var name = backend.namer.invocationName(selector);
           statements.add(js.statement(
               'Function.prototype.# = function(#) { return this(#) }',
               [name, parameters, parameters]));
         }
       });
     });
     return new jsAst.Block(statements);
   }
 }