Add support for the new function-type syntax.

pkg/front_end/lib/src/fasta/kernel/body_builder.dart

Index: pkg/front_end/lib/src/fasta/kernel/body_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/body_builder.dart b/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
index ccee1c5f2db92378a4116cc715d1c8ef472b9a64..f6d250581909cd06440916556b0adad9ce1cf9d7 100644
--- a/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
@@ -1172,7 +1172,7 @@ class BodyBuilder extends ScopeListener<JumpTarget> implements BuilderHelper {
   }
 
   @override
-  void endType(Token beginToken, Token endToken) {
+  void handleType(Token beginToken, Token endToken) {
     // TODO(ahe): The scope is wrong for return types of generic functions.
     debugEvent("Type");
     List<DartType> arguments = pop();