Use entities in runtime_types

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

Index: pkg/compiler/lib/src/kernel/types.dart
diff --git a/pkg/compiler/lib/src/kernel/types.dart b/pkg/compiler/lib/src/kernel/types.dart
index 50afb00b0c606024d7d4d550d1f6c24ccca5dc58..8e17ea8171e49eae36653b222954053088353099 100644
--- a/pkg/compiler/lib/src/kernel/types.dart
+++ b/pkg/compiler/lib/src/kernel/types.dart
@@ -36,11 +36,22 @@ class _KernelDartTypes implements DartTypes {
   }
 
   @override
+  Iterable<InterfaceType> getSupertypes(ClassEntity cls) {
+    return elementMap._getOrderedTypeSet(cls).supertypes;
+  }
+
+  @override
   InterfaceType asInstanceOf(InterfaceType type, ClassEntity cls) {
     return elementMap._asInstanceOf(type, cls);
   }
 
   @override
+  FunctionType getCallType(InterfaceType type) {
+    // TODO(johnniwinther): Compute the call type.
+    throw new UnimplementedError('_KernelDartTypes.getCallType');
+  }
+
+  @override
   CommonElements get commonElements => elementMap.commonElements;
 }