Add CoreClasses

pkg/compiler/lib/src/js_emitter/full_emitter/nsm_emitter.dart

 // Copyright (c) 2013, 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.full_emitter;
 
 class NsmEmitter extends CodeEmitterHelper {
   final List<Selector> trivialNsmHandlers = <Selector>[];
 
   /// If this is true then we can generate the noSuchMethod handlers at startup
@@ skipping 142 matching lines @@
               js.stringPart(",")),
           addQuotes: true);
 
       if (!minify) {
         sortedLongs = sorted.map((selector) =>
             selector.invocationMirrorMemberName);
       }
     }
     // Startup code that loops over the method names and puts handlers on the
     // Object class to catch noSuchMethod invocations.
-    ClassElement objectClass = compiler.objectClass;
+    ClassElement objectClass = compiler.coreClasses.objectClass;
     jsAst.Expression createInvocationMirror = backend.emitter
         .staticFunctionAccess(backend.helpers.createInvocationMirror);
     if (useDiffEncoding) {
       statements.add(js.statement('''{
           var objectClassObject = processedClasses.collected[#objectClass],
               nameSequences = #diffEncoding.split("."),
               shortNames = [];
           if (objectClassObject instanceof Array)
               objectClassObject = objectClassObject[1];
           for (var j = 0; j < nameSequences.length; ++j) {
@@ skipping 208 matching lines @@
   }
 
   String get value {
     if (_cachedValue == null) {
       _cachedValue = _computeDiffEncoding();
     }
 
     return _cachedValue;
   }
 }