Fixes for AST <-> binary serialization.

pkg/kernel/lib/binary/ast_from_binary.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 kernel.ast_from_binary;
 
 import 'dart:convert';
 import 'dart:typed_data';
 
 import '../ast.dart';
 import '../transformations/flags.dart';
@@ skipping 1258 matching lines @@
   }
 
   VariableDeclaration readVariableDeclaration() {
     int offset = readOffset();
     int fileEqualsOffset = readOffset();
     int flags = readByte();
     return new VariableDeclaration(readStringOrNullIfEmpty(),
         type: readDartType(),
         initializer: readExpressionOption(),
         isFinal: flags & 0x1 != 0,
-        isConst: flags & 0x2 != 0)
+        isConst: flags & 0x2 != 0,
+        isFieldFormal: flags & 04 != 0)
       ..fileOffset = offset
       ..fileEqualsOffset = fileEqualsOffset;
   }
 
   int readOffset() {
     // Offset is saved as unsigned,
     // but actually ranges from -1 and up (thus the -1)
     return readUInt() - 1;
   }
 }