Add support for the new function-type syntax.

pkg/front_end/lib/src/fasta/kernel/body_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.body_builder;
 
 import 'package:front_end/src/fasta/parser/parser.dart' show
     FormalParameterType,
     optional;
 
@@ skipping 1154 matching lines @@
     if (builder == null)  {
       warning("Type not found: '$name'.", charOffset);
     } else {
       warning("Not a type: '$name'.", charOffset);
     }
     // TODO(ahe): Create an error somehow.
     return const DynamicType();
   }
 
   @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();
     dynamic name = pop();
     if (name is List) {
       if (name.length != 2) {
         internalError("Unexpected: $name.length");
       }
       var prefix = name[0];
       if (prefix is Identifier) {
@@ skipping 1512 matching lines @@
   } else if (node is TypeDeclarationBuilder) {
     return node.name;
   } else if (node is PrefixBuilder) {
     return node.name;
   } else if (node is ThisPropertyAccessor) {
     return node.name.name;
   } else {
     return internalError("Unhandled: ${node.runtimeType}");
   }
 }