Move nativeInfo encoding into NativeGenerator.

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

 // Copyright (c) 2014, 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.
 
 library dart2js.new_js_emitter.model;
 
 import '../js/js.dart' as js show Expression, Statement, Name, Literal,
     TokenFinalizer;
 import '../constants/values.dart' show ConstantValue;
 
@@ skipping 225 matching lines @@
   final bool isDirectlyInstantiated;
   final bool isNative;
 
   // If the class implements a function type, and the type is encoded in the
   // metatada table, then this field contains the index into that field.
   final js.Expression functionTypeIndex;
 
   /// Whether the class must be evaluated eagerly.
   bool isEager = false;
 
-  /// Data that must be emitted with the class for native interop.
-  js.Literal nativeInfo;
+  /// Leaf tags. See [NativeEmitter.prepareNativeClasses].
+  List<String> nativeLeafTags;
+
+  /// Non-leaf tags. See [NativeEmitter.prepareNativeClasses].
+  List<String> nativeNonLeafTags;
+
+  /// Native extensions. See [NativeEmitter.prepareNativeClasses].
+  List<Class> nativeExtensions;
 
   Class(this.element, this.name, this.holder,
         this.methods,
         this.fields,
         this.staticFieldsForReflection,
         this.callStubs,
         this.typeVariableReaderStubs,
         this.noSuchMethodStubs,
         this.isChecks,
         this.functionTypeIndex,
@@ skipping 227 matching lines @@
               requiredParameterCount: requiredParameterCount,
               optionalParameterDefaultValues: optionalParameterDefaultValues,
               functionType: functionType);
 }
 
 class StaticStubMethod extends StubMethod implements StaticMethod {
   Holder holder;
   StaticStubMethod(js.Name name, this.holder, js.Expression code)
       : super(name, code);
 }