Emit a compile-time error on members with the name of their enclosing class.

sdk/lib/_internal/compiler/implementation/elements/modelx.dart

Index: sdk/lib/_internal/compiler/implementation/elements/modelx.dart
diff --git a/sdk/lib/_internal/compiler/implementation/elements/modelx.dart b/sdk/lib/_internal/compiler/implementation/elements/modelx.dart
index f31ffb1274f5ad47d7668d6cef50c6c49a4b2453..a99d04f735027662b38e4e096fafd7c7b3654f7a 100644
--- a/sdk/lib/_internal/compiler/implementation/elements/modelx.dart
+++ b/sdk/lib/_internal/compiler/implementation/elements/modelx.dart
@@ -1964,6 +1964,9 @@ abstract class ClassElementX extends BaseClassElementX {
   }
 
   void addToScope(Element element, DiagnosticListener listener) {
+    if (element.name == name) {
+      listener.reportError(element, MessageKind.MEMBER_USES_CLASS_NAME);
+    }
     localScope.add(element, listener);
   }