Use entities in some full_emitter sublibraries

pkg/compiler/lib/src/js_emitter/full_emitter/class_builder.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.
 
 library dart2js.js_emitter.full_emitter.class_builder;
 
-import '../../elements/elements.dart'
-    show
-    ClassElement,
-    Element;
+import '../../elements/elements.dart' show Entity;
+import '../../elements/entities.dart';
 import '../../js/js.dart' as jsAst;
 import '../../js/js.dart' show js;
-import '../../js_backend/js_backend.dart'
-    show
-    Namer;
+import '../../js_backend/js_backend.dart' show Namer;
 
 /**
  * A data structure for collecting fragments of a class definition.
  */
 class ClassBuilder {
   final List<jsAst.Property> properties = <jsAst.Property>[];
   final List<jsAst.Literal> fields = <jsAst.Literal>[];
 
   jsAst.Name superName;
   jsAst.Node functionType;
   List<jsAst.Node> fieldMetadata;
 
-  final Element element;
+  final Entity element;
   final Namer namer;
   final bool isForActualClass;
 
   ClassBuilder(this.element, this.namer, this.isForActualClass);
 
-  ClassBuilder.forClass(ClassElement cls, this.namer)
+  ClassBuilder.forClass(ClassEntity cls, this.namer)
       : isForActualClass = true,
         element = cls;
 
   ClassBuilder.forStatics(this.element, this.namer) : isForActualClass = false;
 
   jsAst.Property addProperty(jsAst.Literal name, jsAst.Expression value) {
     jsAst.Property property = new jsAst.Property(js.quoteName(name), value);
     properties.add(property);
     return property;
   }
@@ skipping 46 matching lines @@
       fieldsAndProperties = <jsAst.Property>[];
       fieldsAndProperties.add(new jsAst.Property(
           js.string(namer.classDescriptorProperty), classData));
       fieldsAndProperties.addAll(properties);
     } else {
       fieldsAndProperties = properties;
     }
     return new jsAst.ObjectInitializer(fieldsAndProperties, isOneLiner: false);
   }
 }