Add J-elements

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 af6884d3946a1cae652368319b072eaeaec89962..b57b79df09ce63e86961ba7cae8f303611c5bcbe 100644
--- a/pkg/compiler/lib/src/kernel/types.dart
+++ b/pkg/compiler/lib/src/kernel/types.dart
@@ -32,7 +32,7 @@ class _KernelDartTypes extends DartTypes {
 
   @override
   InterfaceType getThisType(ClassEntity cls) {
-    return elementMap.getThisType(cls);
+    return elementMap._getThisType(cls);
   }
 
   @override
@@ -82,7 +82,7 @@ class _KernelOrderedTypeSetBuilder extends OrderedTypeSetBuilderBase {
             objectType: elementMap.commonElements.objectType);
 
   InterfaceType getThisType(ClassEntity cls) {
-    return elementMap.getThisType(cls);
+    return elementMap._getThisType(cls);
   }
 
   InterfaceType substByContext(InterfaceType type, InterfaceType context) {