Add compile_from_dill_fast_startup_test

pkg/compiler/lib/src/js_emitter/startup_emitter/fragment_emitter.dart

 // Copyright (c) 2015, 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.startup_emitter.model_emitter;
 
 /// The name of the property that stores the tear-off getter on a static
 /// function.
 ///
 /// This property is only used when isolates are used.
@@ skipping 764 matching lines @@
   ///
   /// This section updates the prototype-property of all constructors in the
   /// global holders.
   js.Statement emitPrototypes(Fragment fragment, {softDeferred = false}) {
     List<js.Statement> assignments = fragment.libraries
         .expand((Library library) => library.classes)
         .where((Class cls) => cls.isSoftDeferred == softDeferred)
         .map((Class cls) {
       var proto = js.js.statement(
           '#.prototype = #;', [classReference(cls), emitPrototype(cls)]);
-      ClassElement element = cls.element;
+      ClassEntity element = cls.element;
       compiler.dumpInfoTask.registerElementAst(element, proto);
       compiler.dumpInfoTask.registerElementAst(element.library, proto);
       return proto;
     }).toList(growable: false);
 
     return new js.Block(assignments);
   }
 
   /// Emits the prototype of the given class [cls].
   ///
@@ skipping 757 matching lines @@
     }
     statements.add(js.js.statement("setOrUpdateInterceptorsByTag(#);",
         js.objectLiteral(interceptorsByTag)));
     statements.add(
         js.js.statement("setOrUpdateLeafTags(#);", js.objectLiteral(leafTags)));
     statements.addAll(subclassAssignments);
 
     return wrapPhase('nativeSupport', statements);
   }
 }