Address review comments from https://chromiumcodereview.appspot.com/10542073/

dart/lib/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.
 
 class EnqueueTask extends CompilerTask {
   final Enqueuer codegen;
   final Enqueuer resolution;
 
   String get name() => 'Enqueue';
 
@@ skipping 16 matching lines @@
   bool queueIsClosed = false;
   EnqueueTask task;
 
   Enqueuer(this.compiler)
     : instanceMembersByName = new Map<String, Link<Element>>(),
       seenClasses = new Set<ClassElement>(),
       universe = new Universe(),
       queue = new Queue<WorkItem>(),
       resolvedElements = new Map<Element, TreeElements>();
 
-  bool get isFirstQueue() => compiler.enqueuer.resolution === this;
+  bool get isResolutionQueue() => compiler.enqueuer.resolution === this;
 
   TreeElements getCachedElements(Element element) {
     Element owner = element.getOutermostEnclosingMemberOrTopLevel();
     return compiler.enqueuer.resolution.resolvedElements[owner];
   }
 
   void addToWorkList(Element element, [TreeElements elements]) {
     if (element.isForeign()) return;
     if (queueIsClosed) {
-      if (isFirstQueue && getCachedElements(element) !== null) return;
+      if (isResolutionQueue && getCachedElements(element) !== null) return;
       compiler.internalErrorOnElement(element, "Work list is closed.");
     }
-    if (!isFirstQueue && element.kind === ElementKind.GENERATIVE_CONSTRUCTOR) {
+    if (!isResolutionQueue &&
+        element.kind === ElementKind.GENERATIVE_CONSTRUCTOR) {
       registerInstantiatedClass(element.enclosingElement);
     }
     if (elements === null) {
       elements = getCachedElements(element);
     }
     queue.add(new WorkItem(element, elements));
   }
 
   void registerInstantiatedClass(ClassElement cls) {
     if (cls.isInterface()) {
@@ skipping 203 matching lines @@
   void registerIsCheck(Element element) {
     universe.isChecks.add(element);
   }
 
   void forEach(f(WorkItem work)) {
     while (!queue.isEmpty()) {
       f(queue.removeLast());
     }
   }
 }