Changed LinkedHashSet to Set and LinkedHashMap to Map.

sdk/lib/_internal/compiler/implementation/enqueue.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 dart2js;
 
 typedef ItemCompilationContext ItemCompilationContextCreator();
 
 class EnqueueTask extends CompilerTask {
   final ResolutionEnqueuer resolution;
@@ skipping 560 matching lines @@
 
   /**
    * A post-processing queue for the resolution phase which is processed
    * immediately after the resolution queue has been closed.
    */
   final Queue<PostProcessTask> postQueue;
 
   ResolutionEnqueuer(Compiler compiler,
                      ItemCompilationContext itemCompilationContextCreator())
       : super('resolution enqueuer', compiler, itemCompilationContextCreator),
-        resolvedElements = new LinkedHashMap<Element, TreeElements>(),
+        resolvedElements = new Map<Element, TreeElements>(),
         queue = new Queue<ResolutionWorkItem>(),
         postQueue = new Queue<PostProcessTask>();
 
   bool get isResolutionQueue => true;
 
   bool isProcessed(Element member) => resolvedElements.containsKey(member);
 
   /// Returns [:true:] if [element] has actually been used.
   bool isLive(Element element) {
     if (seenClasses.contains(element)) return true;
@@ skipping 143 matching lines @@
     }
     CodegenWorkItem workItem = new CodegenWorkItem(
         element, itemCompilationContextCreator());
     queue.add(workItem);
   }
 
   void _logSpecificSummary(log(message)) {
     log('Compiled ${generatedCode.length} methods.');
   }
 }