Split World usage into open, inference, and closed world.

pkg/compiler/lib/src/elements/elements.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 elements;
 
 import '../common.dart';
 import '../common/resolution.dart' show Resolution;
 import '../compiler.dart' show Compiler;
 import '../constants/constructors.dart';
@@ skipping 783 matching lines @@
 
   static bool isConstructorOfTypedArraySubclass(
       Element element, Compiler compiler) {
     if (compiler.commonElements.typedDataLibrary == null) return false;
     if (!element.isConstructor) return false;
     ConstructorElement constructor = element.implementation;
     constructor = constructor.effectiveTarget;
     ClassElement cls = constructor.enclosingClass;
     return cls.library == compiler.commonElements.typedDataLibrary &&
         compiler.backend.isNative(cls) &&
-        compiler.world
+        compiler.closedWorld
             .isSubtypeOf(cls, compiler.commonElements.typedDataClass) &&
-        compiler.world.isSubtypeOf(cls, compiler.coreClasses.listClass) &&
+        compiler.closedWorld.isSubtypeOf(cls, compiler.coreClasses.listClass) &&
         constructor.name == '';
   }
 
   static bool switchStatementHasContinue(
       SwitchStatement node, TreeElements elements) {
     for (SwitchCase switchCase in node.cases) {
       for (Node labelOrCase in switchCase.labelsAndCases) {
         Node label = labelOrCase.asLabel();
         if (label != null) {
           LabelDefinition labelElement = elements.getLabelDefinition(label);
@@ skipping 1091 matching lines @@
   /// by a field.
   bool get isDeclaredByField;
 
   /// Returns `true` if this member is abstract.
   bool get isAbstract;
 
   /// If abstract, [implementation] points to the overridden concrete member,
   /// if any. Otherwise [implementation] points to the member itself.
   Member get implementation;
 }