anchor.diff:  
     Uri platform = outDirUri.resolve('platform.dill.tmp');
     Uri outline = outDirUri.resolve('outline.dill');
  +  Uri vmserviceIo = outDirUri.resolve('vmservice_io.dill');
     Uri librariesJson = outDirUri.resolve("lib/libraries.json");
     Uri packages = Uri.base.resolveUri(new Uri.file(packagesFile));
   
  
positive.code: import 'package:path/path.dart' as path;
  
  import 'package:front_end/src/fasta/fasta.dart' as fasta
      show compilePlatform, writeDepsFile;
  
  import 'package:compiler/src/kernel/fasta_support.dart' as dart2js
      show compilePlatform;
  
negative.code:   if (forVm) {
      await fasta.compilePlatform(outDirUri, platform,
          packages: packages, outlineOutput: outline);
      await fasta.compile([
        "--sdk=${outDirUri.toString()}",
        "--platform=${outline.toString()}",
        "--packages=${packages.toString()}",
        "dart:vmservice_io",
        "-o",
        vmserviceIo.toString()
      ]);
    } else {
      await dart2js.compilePlatform(outDirUri, platform,
          packages: packages, outlineOutput: outline);
  