Serialize typedef parameters (including function typed ones) to Kernel and use it to resynthesize t…

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

 // Copyright (c) 2017, 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.kernel_function_type_builder;
 
 import 'package:kernel/ast.dart'
     show
         DartType,
         DynamicType,
         FunctionType,
         NamedType,
         Supertype,
         TypeParameter;
 
 import '../fasta_codes.dart' show messageSupertypeIsFunction;
-
 import 'kernel_builder.dart'
     show
         FormalParameterBuilder,
         FunctionTypeBuilder,
         KernelFormalParameterBuilder,
         KernelTypeBuilder,
         KernelTypeVariableBuilder,
         LibraryBuilder,
         TypeVariableBuilder;
 
@@ skipping 42 matching lines @@
         typeParameters: typeParameters ?? const <TypeParameter>[],
         requiredParameterCount: requiredParameterCount);
   }
 
   Supertype buildSupertype(LibraryBuilder library) {
     library.addCompileTimeError(
         messageSupertypeIsFunction, charOffset, fileUri);
     return null;
   }
 }