Install 'get call' on Closure class.

pkg/compiler/lib/src/resolution/class_members.dart

 // Copyright (c) 2012, 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.
 
 library resolution.compute_members;
 
 import '../elements/elements.dart'
     show Element,
          Name,
          PublicName,
@@ skipping 381 matching lines @@
 
         if (declared.isDeclaredByField && inherited.isMethod) {
           reportError(MessageKind.CANNOT_OVERRIDE_METHOD_WITH_FIELD,
               MessageKind.CANNOT_OVERRIDE_METHOD_WITH_FIELD_CONT);
         } else if (declared.isMethod && inherited.isDeclaredByField) {
           reportError(MessageKind.CANNOT_OVERRIDE_FIELD_WITH_METHOD,
               MessageKind.CANNOT_OVERRIDE_FIELD_WITH_METHOD_CONT);
         } else if (declared.isGetter && inherited.isMethod) {
           reportError(MessageKind.CANNOT_OVERRIDE_METHOD_WITH_GETTER,
                       MessageKind.CANNOT_OVERRIDE_METHOD_WITH_GETTER_CONT);
-        } else if (declared.isMethod && inherited.isGetter) {
+        /*} else if (declared.isMethod && inherited.isGetter) {
           reportError(MessageKind.CANNOT_OVERRIDE_GETTER_WITH_METHOD,
                       MessageKind.CANNOT_OVERRIDE_GETTER_WITH_METHOD_CONT);
-        } else {
+        */} else {
           DartType inheritedType = inherited.functionType;
           if (!compiler.types.isSubtype(declaredType, inheritedType)) {
             void reportWarning(var marker,
                                MessageKind warningKind,
                                MessageKind infoKind) {
               reportMessage(marker, MessageKind.INVALID_OVERRIDE_METHOD, () {
                 compiler.reportWarning(declared.element, warningKind,
                     {'declaredType': declared.type,
                      'name': declared.name.text,
                      'class': cls.thisType,
@@ skipping 488 matching lines @@
         message: "Members have not been fully computed for $this."));
     if (interfaceMembersAreClassMembers) {
       classMembers.forEach((_, member) {
         if (!member.isStatic) f(member);
       });
     } else {
       interfaceMembers.forEach((_, member) => f(member));
     }
   }
 }