Create ResolutionEnqueuer after library loading.

pkg/compiler/lib/src/universe/resolution_world_builder.dart

 // Copyright (c) 2017, 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 world_builder;
 
 abstract class ResolutionWorldBuilder implements WorldBuilder, OpenWorld {
   /// Set of all local functions in the program. Used by the mirror tracking
   /// system to find all live closure instances.
   Iterable<LocalFunctionElement> get localFunctions;
@@ skipping 318 matching lines @@
       new Set<MethodElement>();
 
   final SelectorConstraintsStrategy selectorConstraintsStrategy;
 
   bool hasRuntimeTypeSupport = false;
   bool hasIsolateSupport = false;
   bool hasFunctionApplySupport = false;
 
   /// Used for testing the new more precise computation of instantiated types
   /// and classes.
-  bool useInstantiationMap = false;
+  static bool useInstantiationMap = false;
 
   final JavaScriptBackend _backend;
   final Resolution _resolution;
   bool _closed = false;
   ClosedWorld _closedWorldCache;
   FunctionSetBuilder _allFunctions;
 
   final Set<TypedefElement> _allTypedefs = new Set<TypedefElement>();
 
   final Map<ClassElement, Set<MixinApplicationElement>> _mixinUses =
@@ skipping 599 matching lines @@
   @override
   bool isMemberUsed(MemberEntity member) {
     if (member.isInstanceMember) {
       _MemberUsage usage = _instanceMemberUsage[member];
       if (usage != null && usage.hasUse) return true;
     }
     _StaticMemberUsage usage = _staticMemberUsage[member];
     return usage != null && usage.hasUse;
   }
 }