Revert "Remove definitions from Kernel canonical names."

pkg/kernel/lib/ast.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.
 
 /// -----------------------------------------------------------------------
 ///                           ERROR HANDLING
 /// -----------------------------------------------------------------------
 ///
 /// As a rule of thumb, errors that can be detected statically are handled by
 /// the frontend, typically by translating the erroneous code into a 'throw' or
@@ skipping 979 matching lines @@
   void set isConst(bool value) {
     flags = value ? (flags | FlagConst) : (flags & ~FlagConst);
   }
 
   bool get isInstanceMember => !isStatic;
   bool get isGetter => kind == ProcedureKind.Getter;
   bool get isSetter => kind == ProcedureKind.Setter;
   bool get isAccessor => isGetter || isSetter;
   bool get hasGetter => kind != ProcedureKind.Setter;
   bool get hasSetter => kind == ProcedureKind.Setter;
-  bool get isFactory => kind == ProcedureKind.Factory;
 
   accept(MemberVisitor v) => v.visitProcedure(this);
 
   acceptReference(MemberReferenceVisitor v) => v.visitProcedureReference(this);
 
   visitChildren(Visitor v) {
     visitList(annotations, v);
     name?.accept(v);
     function?.accept(v);
   }
@@ skipping 3221 matching lines @@
 /// library has not been assigned a canonical name yet.
 ///
 /// Returns `null` if the library is `null`.
 CanonicalName getCanonicalNameOfLibrary(Library library) {
   if (library == null) return null;
   if (library.canonicalName == null) {
     throw '$library has no canonical name';
   }
   return library.canonicalName;
 }