dart2js: Use is-checks from the model in the old emitter.

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;
 import '../constants/values.dart' show ConstantValue;
 
 import '../deferred_load.dart' show OutputUnit;
@@ skipping 152 matching lines @@
 class Class {
   /// The element should only be used during the transition to the new model.
   /// Uses indicate missing information in the model.
   final Element element;
 
   final String name;
   final Holder holder;
   Class _superclass;
   final List<Method> methods;
   final List<InstanceField> fields;
+  final List<StubMethod> isChecks;
   final bool onlyForRti;
   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 int functionTypeIndex;
+
   /// Whether the class must be evaluated eagerly.
   bool isEager = false;
 
-  Class(this.element,
-        this.name, this.holder, this.methods, this.fields,
+  Class(this.element, this.name, this.holder,
+        this.methods,
+        this.fields,
+        this.isChecks,
+        this.functionTypeIndex,
         {this.onlyForRti,
          this.isDirectlyInstantiated,
          this.isNative}) {
     assert(onlyForRti != null);
     assert(isDirectlyInstantiated != null);
     assert(isNative != null);
   }
 
   bool get isMixinApplication => false;
   Class get superclass => _superclass;
 
   void setSuperclass(Class superclass) {
     _superclass = superclass;
   }
 
   String get superclassName
       => (superclass == null) ? "" : superclass.name;
   int get superclassHolderIndex
       => (superclass == null) ? 0 : superclass.holder.index;
 }
 
 class MixinApplication extends Class {
   Class _mixinClass;
 
-  MixinApplication(Element element,
-                   String name, Holder holder,
-                   List<Method> methods,
-                   List<InstanceField> fields,
+  MixinApplication(Element element, String name, Holder holder,
+                   List<StubMethod> isChecks,
+                   int functionTypeIndex,
                    {bool onlyForRti,
                     bool isDirectlyInstantiated})
       : super(element,
-              name, holder, methods, fields,
+              name, holder,
+              const <Method>[], const <InstanceField>[],
+              isChecks, functionTypeIndex,
               onlyForRti: onlyForRti,
               isDirectlyInstantiated: isDirectlyInstantiated,
               isNative: false);
 
   bool get isMixinApplication => true;
   Class get mixinClass => _mixinClass;
 
   void setMixinClass(Class mixinClass) {
     _mixinClass = mixinClass;
   }
@@ skipping 49 matching lines @@
   StaticMethod(Element element, String name, this.holder, js.Expression code,
                {bool needsTearOff})
       : super(element, name, code, needsTearOff: needsTearOff);
 }
 
 class StaticStubMethod extends StaticMethod {
   StaticStubMethod(String name, Holder holder, js.Expression code,
                    {bool needsTearOff})
       : super(null, name, holder, code, needsTearOff: needsTearOff);
 }