Fix dispatch name of covariance-checked calls.

pkg/kernel/lib/transformations/insert_covariance_checks.dart

Index: pkg/kernel/lib/transformations/insert_covariance_checks.dart
diff --git a/pkg/kernel/lib/transformations/insert_covariance_checks.dart b/pkg/kernel/lib/transformations/insert_covariance_checks.dart
index b4e1869830dbe3e57e28671fe510cd38a90f986e..662dda968f71743ec587344ba3293aa1d5307cbd 100644
--- a/pkg/kernel/lib/transformations/insert_covariance_checks.dart
+++ b/pkg/kernel/lib/transformations/insert_covariance_checks.dart
@@ -504,13 +504,21 @@ class _CallTransformer extends RecursiveVisitor {
 
   @override
   visitMethodInvocation(MethodInvocation node) {
-    node.interfaceTarget = getChecked(node.receiver, node.interfaceTarget);
+    var target = getChecked(node.receiver, node.interfaceTarget);
+    if (target != null) {
+      node.interfaceTarget = target;
+      node.name = target.name;
+    }
     node.visitChildren(this);
   }
 
   @override
   visitPropertySet(PropertySet node) {
-    node.interfaceTarget = getChecked(node.receiver, node.interfaceTarget);
+    var target = getChecked(node.receiver, node.interfaceTarget);
+    if (target != null) {
+      node.interfaceTarget = target;
+      node.name = target.name;
+    }
     node.visitChildren(this);
   }
 }