Add UnlinkedClass.hasNoSupertype property to summaries.

pkg/analyzer/tool/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 is not
  * executed directly; instead it is parsed and transformed into code that
  * implements the summary format.
  *
  * The code generation process introduces the following non-typical semantics:
@@ skipping 211 matching lines @@
 
   /**
    * Indicates whether the class is declared with the `abstract` keyword.
    */
   bool isAbstract;
 
   /**
    * Indicates whether the class is declared using mixin application syntax.
    */
   bool isMixinApplication;
+
+  /**
+   * Indicates whether this class is the core "Object" class (and hence has no
+   * supertype)
+   */
+  bool hasNoSupertype;
 }
 
 /**
  * Unlinked summary information about a `show` or `hide` combinator in an
  * import or export declaration.
  */
 class UnlinkedCombinator {
   /**
    * List of names which are shown.  Empty if this is a `hide` combinator.
    */
@@ skipping 466 matching lines @@
   /**
    * Indicates whether the variable is declared using the `const` keyword.
    */
   bool isConst;
 
   /**
    * Indicates whether this variable lacks an explicit type declaration.
    */
   bool hasImplicitType;
 }