Remove Compiler.inferenceWorld

pkg/compiler/lib/src/world.dart

Index: pkg/compiler/lib/src/world.dart
diff --git a/pkg/compiler/lib/src/world.dart b/pkg/compiler/lib/src/world.dart
index 2ddfbd885a141cf38591c7aa1cf277bce634c6a3..41ceb0f41c2491b2e55756c4f2c8cf21e838a382 100644
--- a/pkg/compiler/lib/src/world.dart
+++ b/pkg/compiler/lib/src/world.dart
@@ -8,7 +8,7 @@ import 'cache_strategy.dart';
 import 'closure.dart' show SynthesizedCallMethodElementX;
 import 'common/backend_api.dart' show BackendClasses;
 import 'common.dart';
-import 'core_types.dart' show CoreClasses;
+import 'core_types.dart' show CoreClasses, CommonElements;
 import 'dart_types.dart';
 import 'elements/elements.dart'
     show
@@ -47,6 +47,8 @@ abstract class ClosedWorld implements World {
   /// Access to core classes used in the Dart language.
   CoreClasses get coreClasses;
 
+  CommonElements get commonElements;
+
   CommonMasks get commonMasks;
 
   /// Returns `true` if [cls] is either directly or indirectly instantiated.
@@ -874,7 +876,7 @@ class WorldImpl implements ClosedWorld, ClosedWorldRefiner, OpenWorld {
 
   CommonMasks _commonMasks;
 
-  final CoreClasses coreClasses;
+  final CommonElements commonElements;
 
   final CacheStrategy cacheStrategy;
 
@@ -886,7 +888,7 @@ class WorldImpl implements ClosedWorld, ClosedWorldRefiner, OpenWorld {
     return _typesImplementedBySubclasses[cls.declaration];
   }
 
-  WorldImpl(this.resolverWorld, this._backend, this.coreClasses,
+  WorldImpl(this.resolverWorld, this._backend, this.commonElements,
       CacheStrategy cacheStrategy)
       : this.cacheStrategy = cacheStrategy,
         alreadyPopulated = cacheStrategy.newSet() {
@@ -900,6 +902,8 @@ class WorldImpl implements ClosedWorld, ClosedWorldRefiner, OpenWorld {
     return _commonMasks;
   }
 
+  CoreClasses get coreClasses => commonElements;
+
   /// Called to add [cls] to the set of known classes.
   ///
   /// This ensures that class hierarchy queries can be performed on [cls] and