Add CoreClasses

tests/compiler/dart2js/resolver_test.dart

Index: tests/compiler/dart2js/resolver_test.dart
diff --git a/tests/compiler/dart2js/resolver_test.dart b/tests/compiler/dart2js/resolver_test.dart
index 236b0bd22099886f24134714e96ee4a08e9a5a60..8a2b887d0e85ec4ec5604f99e22f3e03b3aebf83 100644
--- a/tests/compiler/dart2js/resolver_test.dart
+++ b/tests/compiler/dart2js/resolver_test.dart
@@ -163,7 +163,8 @@ Future testTypeVariables() {
       compiler.parseScript('class Foo<T, U> {}');
       ClassElement foo = compiler.mainApp.find('Foo');
       matchResolvedTypes(visitor, 'Foo<int, String> x;', 'Foo',
-                         [compiler.intClass, compiler.stringClass]);
+                         [compiler.coreClasses.intClass,
+                          compiler.coreClasses.stringClass]);
       matchResolvedTypes(visitor, 'Foo<Foo, Foo> x;', 'Foo',
                          [foo, foo]);
     }),