Split interceptor emitter.

sdk/lib/_internal/compiler/implementation/js_backend/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 js_backend;
 
 class NativeEmitter {
 
   final Map<Element, ClassBuilder> cachedBuilders;
 
@@ skipping 96 matching lines @@
 
     Set<ClassElement> neededClasses = new Set<ClassElement>();
     Set<ClassElement> nonleafClasses = new Set<ClassElement>();
 
     Map<ClassElement, List<ClassElement>> extensionPoints =
         computeExtensionPoints(preOrder);
 
     neededClasses.add(compiler.objectClass);
 
     Set<ClassElement> neededByConstant =
-        emitterTask.interceptorEmitter.interceptorsReferencedFromConstants();
+        emitterTask.interceptorsReferencedFromConstants();
     Set<ClassElement> modifiedClasses =
         emitterTask.typeTestEmitter.classesModifiedByEmitRuntimeTypeSupport();
 
     for (ClassElement classElement in preOrder.reversed) {
       // Post-order traversal ensures we visit the subclasses before their
       // superclass.  This makes it easy to tell if a class is needed because a
       // subclass is needed.
       ClassBuilder builder = builders[classElement];
       bool needed = false;
       if (builder == null) {
@@ skipping 347 matching lines @@
       if (emitterTask.compiler.enableMinification) targetBuffer.add(';');
       targetBuffer.add(jsAst.prettyPrint(
           new jsAst.ExpressionStatement(init), compiler));
       targetBuffer.add('\n');
     }
 
     targetBuffer.add(nativeBuffer);
     targetBuffer.add('\n');
   }
 }