[kernel] Streaming ScopeBuilder

pkg/kernel/lib/binary/tag.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.binary.tag;
 
 class Tag {
   static const int Nothing = 0;
   static const int Something = 1;
 
   static const int Class = 2;
 
+  static const int FunctionNode = 3;
+
   static const int Field = 4;
   static const int Constructor = 5;
   static const int Procedure = 6;
 
   static const int InvalidInitializer = 7;
   static const int FieldInitializer = 8;
   static const int SuperInitializer = 9;
   static const int RedirectingInitializer = 10;
   static const int LocalInitializer = 11;
 
@@ skipping 94 matching lines @@
   static const int SpecializedPayloadMask = 0x7; // 00000111
 
   static const int SpecializedVariableGet = 128;
   static const int SpecializedVariableSet = 136;
   static const int SpecializedIntLiteral = 144;
 
   static const int SpecializedIntLiteralBias = 3;
 
   static const int ProgramFile = 0x90ABCDEF;
 }