Pass '=' to endNamedMixinApplication().

pkg/front_end/lib/src/fasta/analyzer/ast_builder.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.
 
 library fasta.analyzer.ast_builder;
 
 import 'package:front_end/src/fasta/scanner/token.dart'
     show BeginGroupToken, Token;
 
 import 'package:analyzer/analyzer.dart';
@@ skipping 824 matching lines @@
     List<TypeName> mixinTypes = pop();
     // TODO(paulberry,ahe): the parser doesn't give us enough information to
     // locate the "with" keyword.
     Token withKeyword;
     TypeName supertype = pop();
     push(new _MixinApplication(supertype, withKeyword, mixinTypes));
   }
 
   @override
   void endNamedMixinApplication(
-      Token beginToken, Token implementsKeyword, Token endToken) {
+      Token beginToken, Token equalsToken, Token implementsKeyword, Token endToken) {

[ahe, 2017/02/22 05:35:54]

Long line.

     debugEvent("NamedMixinApplication");
     ImplementsClause implementsClause;
     if (implementsKeyword != null) {
       List<TypeName> interfaces = pop();
       implementsClause =
           ast.implementsClause(toAnalyzerToken(implementsKeyword), interfaces);
     }
     _MixinApplication mixinApplication = pop();
     var superclass = mixinApplication.supertype;
     var withClause = ast.withClause(
         toAnalyzerToken(mixinApplication.withKeyword),
         mixinApplication.mixinTypes);
-    // TODO(paulberry,ahe): the parser should give us the "=" token.
-    analyzer.Token equals;
+    analyzer.Token equals = toAnalyzerToken(equalsToken);
     TypeParameterList typeParameters = pop();
     SimpleIdentifier name = pop();
     Token classKeyword;
     // TODO(paulberry,ahe): This is a hack.  The parser should give us the class
     // keyword.
     if (identical(beginToken.value, 'abstract')) {
       classKeyword = beginToken.next;
     } else {
       classKeyword = beginToken;
     }
@@ skipping 150 matching lines @@
 /// [ClassDeclaration] or [ClassTypeAlias] object.
 class _MixinApplication {
   final TypeName supertype;
 
   final Token withKeyword;
 
   final List<TypeName> mixinTypes;
 
   _MixinApplication(this.supertype, this.withKeyword, this.mixinTypes);
 }