Create LookupMapAnalysis late.

pkg/compiler/lib/src/js_backend/enqueuer.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.
 
 library dart2js.js.enqueue;
 
 import 'dart:collection' show Queue;
 
 import '../common/codegen.dart' show CodegenWorkItem;
 import '../common/tasks.dart' show CompilerTask;
@@ skipping 230 matching lines @@
   /// [_onQueueEmpty] is called whenever the queue is drained. [recentClasses]
   /// contains the set of all classes seen for the first time since
   /// [_onQueueEmpty] was called last. A return value of [true] indicates that
   /// the [recentClasses] have been processed and may be cleared. If [false] is
   /// returned, [_onQueueEmpty] will be called once the queue is empty again (or
   /// still empty) and [recentClasses] will be a superset of the current value.
   bool _onQueueEmpty(Iterable<ClassEntity> recentClasses) {
     return listener.onQueueEmpty(this, recentClasses);
   }
 
-  void logSummary(log(message)) {
+  @override
+  void logSummary(void log(String message)) {
     log('Compiled ${_processedEntities.length} methods.');
     listener.logSummary(log);
   }
 
   String toString() => 'Enqueuer($name)';
 
   ImpactUseCase get impactUse => IMPACT_USE;
 
   @override
   Iterable<Entity> get processedEntities => _processedEntities;
@@ skipping 21 matching lines @@
     // code for checked setters.
     if (element.isField && element.isInstanceMember) {
       if (!_options.enableTypeAssertions ||
           element.enclosingElement.isClosure) {
         return null;
       }
     }
     return new CodegenWorkItem(_backend, element);
   }
 }