Rename Enqueuer.universe to worldBuilder.

tests/compiler/dart2js/kernel/closed_world_test.dart

 // Copyright (c) 2016, 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.
 
 // Tests that the closed world computed from [WorldImpact]s derived from kernel
 // is equivalent to the original computed from resolution.
 library dart2js.kernel.closed_world_test;
 
 import 'package:async_helper/async_helper.dart';
 import 'package:compiler/src/commandline_options.dart';
@@ skipping 58 matching lines @@
     enableDebugMode();
     Compiler compiler = compilerFor(
         entryPoint: entryPoint,
         memorySourceFiles: memorySourceFiles,
         options: [
           Flags.analyzeOnly,
           Flags.useKernel,
           Flags.enableAssertMessage
         ]);
     ResolutionWorldBuilderImpl worldBuilder =
-        compiler.enqueuer.resolution.universe;
+        compiler.enqueuer.resolution.worldBuilder;
     worldBuilder.useInstantiationMap = true;
     compiler.resolution.retainCachesForTesting = true;
     await compiler.run(entryPoint);
-    compiler.resolverWorld.closeWorld(compiler.reporter);
+    compiler.resolutionWorldBuilder.closeWorld(compiler.reporter);
 
     JavaScriptBackend backend = compiler.backend;
     // Create a new resolution enqueuer and feed it with the [WorldImpact]s
     // computed from kernel through the [build] in `kernel_impact.dart`.
     ResolutionEnqueuer enqueuer = new ResolutionEnqueuer(
         compiler.enqueuer,
         compiler.options,
         compiler.resolution,
         const TreeShakingEnqueuerStrategy(),
         compiler.globalDependencies,
@@ skipping 13 matching lines @@
         .processNativeClasses(compiler.libraryLoader.libraries));
     enqueuer.applyImpact(
         backend.computeMainImpact(compiler.mainFunction, forResolution: true));
     enqueuer.forEach((work) {
       AstElement element = work.element;
       ResolutionImpact resolutionImpact = build(compiler, element.resolvedAst);
       WorldImpact worldImpact = compiler.backend.impactTransformer
           .transformResolutionImpact(enqueuer, resolutionImpact);
       enqueuer.applyImpact(worldImpact, impactSource: element);
     });
-    ClosedWorld closedWorld = enqueuer.universe.closeWorld(compiler.reporter);
+    ClosedWorld closedWorld =
+        enqueuer.worldBuilder.closeWorld(compiler.reporter);
 
     checkResolutionEnqueuers(compiler.enqueuer.resolution, enqueuer,
         typeEquivalence: (ResolutionDartType a, ResolutionDartType b) {
       return areTypesEquivalent(unalias(a), unalias(b));
     }, elementFilter: (Element element) {
       if (element is ConstructorElement && element.isRedirectingFactory) {
         // Redirecting factory constructors are skipped in kernel.
         return false;
       }
       if (element is ClassElement) {
         for (ConstructorElement constructor in element.constructors) {
           if (!constructor.isRedirectingFactory) {
             return true;
           }
         }
         // The class cannot itself be instantiated.
         return false;
       }
       return true;
     }, verbose: arguments.verbose);
-    checkClosedWorlds(compiler.resolverWorld.closedWorldForTesting, closedWorld,
+    checkClosedWorlds(
+        compiler.resolutionWorldBuilder.closedWorldForTesting, closedWorld,
         verbose: arguments.verbose);
   });
 }