Implement PropertyAccessorElementForLink_Variable.getContainedName().

pkg/analyzer/lib/src/summary/link.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * This library is capable of producing linked summaries from unlinked
  * ones (or prelinked ones).  It functions by building a miniature
  * element model to represent the contents of the summaries, and then
  * scanning the element model to gather linked information and adding
  * it to the summary data structures.
@@ skipping 3644 matching lines @@
       // library cycle containing it.  So we shouldn't use the inferred type
       // (even if we have already computed it), since that would lead to
       // non-deterministic type inference results.
       return DynamicTypeImpl.instance;
     } else {
       return variable.type;
     }
   }
 
   @override
-  ReferenceableElementForLink getContainedName(String name) =>
-      UndefinedElementForLink.instance;
+  ReferenceableElementForLink getContainedName(String name) {
+    Element element = variable._getContainedElement(name);
+    return new NonstaticMemberElementForLink(element, variable._constNode);
+  }
 
   @override
   bool isAccessibleIn(LibraryElement library) =>
       !Identifier.isPrivateName(name) || identical(this.library, library);
 
   @override
   void link(CompilationUnitElementInBuildUnit compilationUnit) {}
 
   @override
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
@@ skipping 764 matching lines @@
       if (type is InterfaceType) {
         Element result = type.lookUpGetter(name, compilationUnit.library);
         result ??= type.lookUpMethod(name, compilationUnit.library);
         return result;
       }
     }
     // TODO(scheglov): implement for propagated types
     return null;
   }
 }