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pkg/compiler/lib/src/js_emitter/native_emitter.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.
 
 part of dart2js.js_emitter;
 
 class NativeEmitter {
   // TODO(floitsch): the native-emitter should not know about ClassBuilders.
   final Map<Element, full_js_emitter.ClassBuilder> cachedBuilders;
 
@@ skipping 78 matching lines @@
       }
       if (cls.element == helpers.jsInterceptorClass) {
         jsInterceptorClass = cls;
         return;
       }
       if (seen.contains(cls)) return;
       seen.add(cls);
       walk(cls.superclass);
       preOrder.add(cls);
     }
+
     classes.forEach(walk);
 
     // Find which classes are needed and which are non-leaf classes.  Any class
     // that is not needed can be treated as a leaf class equivalent to some
     // needed class.
 
     Set<Class> neededClasses = new Set<Class>();
     Set<Class> nonLeafClasses = new Set<Class>();
 
     Map<Class, List<Class>> extensionPoints = computeExtensionPoints(preOrder);
@@ skipping 71 matching lines @@
           cls.nativeNonLeafTags == null &&
           cls.nativeExtensions == null);
       if (leafTags[cls] != null) {
         cls.nativeLeafTags = leafTags[cls].toList(growable: false);
       }
       if (nonleafTags[cls] != null) {
         cls.nativeNonLeafTags = nonleafTags[cls].toList(growable: false);
       }
       cls.nativeExtensions = extensionPoints[cls];
     }
+
     // Add properties containing the information needed to construct maps used
     // by getNativeInterceptor and custom elements.
     if (compiler.enqueuer.codegen.nativeEnqueuer
         .hasInstantiatedNativeClasses()) {
       fillNativeInfo(jsInterceptorClass);
       for (Class cls in classes) {
         if (!cls.isNative || neededClasses.contains(cls)) {
           fillNativeInfo(cls);
         }
       }
@@ skipping 149 matching lines @@
     // used.  We should also use an interceptor if the check can't be satisfied
     // by a native class in case we get a native instance that tries to spoof
     // the type info.  i.e the criteria for whether or not to use an interceptor
     // is whether the receiver can be native, not the type of the test.
     if (element == null || !element.isClass) return false;
     ClassElement cls = element;
     if (backend.isNativeOrExtendsNative(cls)) return true;
     return isSupertypeOfNativeClass(element);
   }
 }