Pass '=' to endNamedMixinApplication().

pkg/front_end/lib/src/fasta/parser/listener.dart

Index: pkg/front_end/lib/src/fasta/parser/listener.dart
diff --git a/pkg/front_end/lib/src/fasta/parser/listener.dart b/pkg/front_end/lib/src/fasta/parser/listener.dart
index 95dfdae23067f7b3bd03812de26b507aac1af254..f1384f4384a2124b0da0ddfdb60b3377a61a0b2e 100644
--- a/pkg/front_end/lib/src/fasta/parser/listener.dart
+++ b/pkg/front_end/lib/src/fasta/parser/listener.dart
@@ -261,7 +261,7 @@ class Listener {
   /// declaration, each implemented type is listed separately on the stack, and
   /// the number of implemented types is passed as a parameter.
   void endNamedMixinApplication(
-      Token begin, Token implementsKeyword, Token endToken) {
+      Token begin, Token equals, Token implementsKeyword, Token endToken) {
     logEvent("NamedMixinApplication");
   }