Move remaining functionality from ClassWorld to ClosedWorld

pkg/compiler/lib/src/ssa/interceptor_simplifier.dart

Index: pkg/compiler/lib/src/ssa/interceptor_simplifier.dart
diff --git a/pkg/compiler/lib/src/ssa/interceptor_simplifier.dart b/pkg/compiler/lib/src/ssa/interceptor_simplifier.dart
index eafe01b614506fa671e9ae35334697362c9469f4..1716c7f9d20c9d51dadd730b0e2ce615e5e39ed2 100644
--- a/pkg/compiler/lib/src/ssa/interceptor_simplifier.dart
+++ b/pkg/compiler/lib/src/ssa/interceptor_simplifier.dart
@@ -11,7 +11,7 @@ import '../js_backend/backend_helpers.dart' show BackendHelpers;
 import '../js_backend/js_backend.dart';
 import '../types/types.dart';
 import '../universe/selector.dart' show Selector;
-import '../world.dart' show ClassWorld;
+import '../world.dart' show ClosedWorld;
 import 'nodes.dart';
 import 'optimize.dart';
 
@@ -49,7 +49,7 @@ class SsaSimplifyInterceptors extends HBaseVisitor
 
   BackendHelpers get helpers => backend.helpers;
 
-  ClassWorld get classWorld => compiler.closedWorld;
+  ClosedWorld get closedWorld => compiler.closedWorld;
 
   void visitGraph(HGraph graph) {
     this.graph = graph;
@@ -109,8 +109,8 @@ class SsaSimplifyInterceptors extends HBaseVisitor
 
     // All intercepted classes extend `Interceptor`, so if the receiver can't be
     // a class extending `Interceptor` then it can be called directly.
-    return new TypeMask.nonNullSubclass(helpers.jsInterceptorClass, classWorld)
-        .isDisjoint(receiver.instructionType, classWorld);
+    return new TypeMask.nonNullSubclass(helpers.jsInterceptorClass, closedWorld)
+        .isDisjoint(receiver.instructionType, closedWorld);
   }
 
   HInstruction tryComputeConstantInterceptor(
@@ -145,17 +145,17 @@ class SsaSimplifyInterceptors extends HBaseVisitor
       if (type.isNull) {
         return helpers.jsNullClass;
       }
-    } else if (type.containsOnlyInt(classWorld)) {
+    } else if (type.containsOnlyInt(closedWorld)) {
       return helpers.jsIntClass;
-    } else if (type.containsOnlyDouble(classWorld)) {
+    } else if (type.containsOnlyDouble(closedWorld)) {
       return helpers.jsDoubleClass;
-    } else if (type.containsOnlyBool(classWorld)) {
+    } else if (type.containsOnlyBool(closedWorld)) {
       return helpers.jsBoolClass;
-    } else if (type.containsOnlyString(classWorld)) {
+    } else if (type.containsOnlyString(closedWorld)) {
       return helpers.jsStringClass;
-    } else if (type.satisfies(helpers.jsArrayClass, classWorld)) {
+    } else if (type.satisfies(helpers.jsArrayClass, closedWorld)) {
       return helpers.jsArrayClass;
-    } else if (type.containsOnlyNum(classWorld) &&
+    } else if (type.containsOnlyNum(closedWorld) &&
         !interceptedClasses.contains(helpers.jsIntClass) &&
         !interceptedClasses.contains(helpers.jsDoubleClass)) {
       // If the method being intercepted is not defined in [int] or [double] we
@@ -174,7 +174,7 @@ class SsaSimplifyInterceptors extends HBaseVisitor
       // for a subclass or call methods defined on a subclass.  Provided the
       // code is completely insensitive to the specific instance subclasses, we
       // can use the non-leaf class directly.
-      ClassElement element = type.singleClass(classWorld);
+      ClassElement element = type.singleClass(closedWorld);
       if (element != null && backend.isNative(element)) {
         return element;
       }