Pass 'classKeyword' to endClassDeclaratio() and 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 7407d212671373c341b19f7f82e3b142f0dcc3f5..5a400b94e4a5d7804b90b70da31aa87dd313f445 100644
--- a/pkg/front_end/lib/src/fasta/parser/listener.dart
+++ b/pkg/front_end/lib/src/fasta/parser/listener.dart
@@ -76,7 +76,8 @@ class Listener {
   /// - implemented types
   /// - class body
   void endClassDeclaration(int interfacesCount, Token beginToken,
-      Token extendsKeyword, Token implementsKeyword, Token endToken) {
+      Token classKeyword, Token extendsKeyword, Token implementsKeyword,
+      Token endToken) {
     logEvent("ClassDeclaration");
   }
 
@@ -267,7 +268,8 @@ 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 equals, Token implementsKeyword, Token endToken) {
+      Token begin, Token classKeyword, Token equals, Token implementsKeyword,
+      Token endToken) {
     logEvent("NamedMixinApplication");
   }