Pass '=' to endNamedMixinApplication().

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

Index: pkg/front_end/lib/src/fasta/parser/parser.dart
diff --git a/pkg/front_end/lib/src/fasta/parser/parser.dart b/pkg/front_end/lib/src/fasta/parser/parser.dart
index 299c97b7771fdad4965f76d2c35b19b066674cdd..2a327ae81f3e903054749ef8117315c213dcb965 100644
--- a/pkg/front_end/lib/src/fasta/parser/parser.dart
+++ b/pkg/front_end/lib/src/fasta/parser/parser.dart
@@ -731,21 +731,23 @@ class Parser {
     token = parseTypeVariablesOpt(token);
 
     if (optional('=', token)) {
-      token = expect('=', token);
-      return parseNamedMixinApplication(token, begin, name);
+      Token equals = token;
+      token = token.next;
+      return parseNamedMixinApplication(token, begin, name, equals);
     } else {
       return parseClass(token, begin, name);
     }
   }
 
-  Token parseNamedMixinApplication(Token token, Token begin, Token name) {
+  Token parseNamedMixinApplication(Token token, Token begin, Token name,
+      Token equals) {
     token = parseMixinApplication(token);
     Token implementsKeyword = null;
     if (optional('implements', token)) {
       implementsKeyword = token;
       token = parseTypeList(token.next);
     }
-    listener.endNamedMixinApplication(begin, implementsKeyword, token);
+    listener.endNamedMixinApplication(begin, equals, implementsKeyword, token);
     return expect(';', token);
   }