Disallow deprecated typedef syntax for mixin apps in the VM (fixes #14410).

runtime/vm/parser.h

 // 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.
 
 #ifndef RUNTIME_VM_PARSER_H_
 #define RUNTIME_VM_PARSER_H_
 
 #include "include/dart_api.h"
 
 #include "platform/assert.h"
@@ skipping 732 matching lines @@
   AstNode* ParseFunctionStatement(bool is_literal);
   AstNode* ParseYieldStatement();
   AstNode* ParseStatement();
   SequenceNode* ParseNestedStatement(bool parsing_loop_body,
                                      SourceLabel* label);
   void ParseStatementSequence();
   bool IsIdentifier();
   bool IsSymbol(const String& symbol);
   bool IsSimpleLiteral(const AbstractType& type, Instance* value);
   bool IsFunctionTypeAliasName();
-  bool IsMixinAppAlias();
   bool TryParseQualIdent();
   bool TryParseTypeParameters();
   bool TryParseTypeArguments();
   bool IsTypeParameters();
   bool IsArgumentPart();
   bool IsParameterPart();
   bool TryParseOptionalType();
   bool TryParseReturnType();
   bool IsVariableDeclaration();
   bool IsFunctionReturnType();
@@ skipping 210 matching lines @@
 
   intptr_t recursion_counter_;
   friend class RecursionChecker;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_PARSER_H_