Issue 28491. Add support for UnlinkedExprOperation.pushSuper even though it is not allowed.

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

 // Copyright (c) 2015, 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 file is an "idl" style description of the summary format.  It
  * contains abstract classes which declare the interface for reading data from
  * summaries.  It is parsed and transformed into code that implements the
  * summary format.
  *
@@ skipping 2370 matching lines @@
    * This will be used to experiment with prunning the const expression tree. If
    * a constant has an error, we can omit the subexpression containing the error
    * and only include a marker that an error was detected.
    */
   pushError,
 
   /**
    * Push `this` expression onto the stack.
    */
   pushThis,
+
+  /**
+   * Push `super` expression onto the stack.
+   */
+  pushSuper,
 }
 
 /**
  * Unlinked summary information about an import declaration.
  */
 abstract class UnlinkedImport extends base.SummaryClass {
   /**
    * Annotations for this import declaration.
    */
   @Id(8)
@@ skipping 730 matching lines @@
   @Id(11)
   int get visibleLength;
 
   /**
    * If a local variable, the beginning of the visible range; zero otherwise.
    */
   @informative
   @Id(12)
   int get visibleOffset;
 }