Read platform.dill in the VM.

pkg/kernel/lib/binary/ast_to_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_to_binary;
 
 import '../ast.dart';
 import '../import_table.dart';
 import 'tag.dart';
 import 'dart:convert';
 import 'dart:typed_data';
@@ skipping 128 matching lines @@
   void writeCanonicalNameEntry(CanonicalName node) {
     var parent = node.parent;
     if (parent.isRoot) {
       writeByte(0);
     } else {
       writeUInt30(parent.index + 1);
     }
     writeStringReference(node.name);
   }
 
+  StringIndexer get stringIndexer => _stringIndexer;
+  void flush() => _flush();
+
   void writeProgramFile(Program program) {
     program.computeCanonicalNames();
     writeMagicWord(Tag.ProgramFile);
     _stringIndexer.scanProgram(program);
     writeStringTable(_stringIndexer);
     writeUriToSource(program);
     writeLinkTable(program);
     writeList(program.libraries, writeNode);
     writeMemberReference(program.mainMethod, allowNull: true);
     _flush();
@@ skipping 1138 matching lines @@
   void flush() {
     _sink.add(_buffer.sublist(0, length));
     _buffer = new Uint8List(SIZE);
     length = 0;
   }
 
   void flushAndDestroy() {
     _sink.add(_buffer.sublist(0, length));
   }
 }