A step towards handling `new Object()` in compile_from_dill_test

pkg/compiler/lib/src/kernel/element_map.dart

Index: pkg/compiler/lib/src/kernel/element_map.dart
diff --git a/pkg/compiler/lib/src/kernel/element_map.dart b/pkg/compiler/lib/src/kernel/element_map.dart
index 7754187800e3f0206b6c37c88174f6f0a0b2d41d..11e45fcd35566d5d8377d815d8b7b4bef4e8cd45 100644
--- a/pkg/compiler/lib/src/kernel/element_map.dart
+++ b/pkg/compiler/lib/src/kernel/element_map.dart
@@ -43,6 +43,10 @@ abstract class KernelToElementMap {
   /// Returns the [InterfaceType] corresponding to [type].
   InterfaceType getInterfaceType(ir.InterfaceType type);
 
+  /// Returns the 'this type' of [cls]. That is, the instantiation of [cls]
+  /// where the type arguments are the type variables of [cls].
+  InterfaceType getThisType(ClassEntity cls);
+
   /// Return the [InterfaceType] corresponding to the [cls] with the given
   /// [typeArguments].
   InterfaceType createInterfaceType(