anchor.diff:  
   final SDK_FILES = ['sdk/dartsdk-macos-x64-release.zip',
                      'sdk/dartsdk-macos-ia32-release.zip' ];
  -final DARTIUM_FILES = ['dartium/dartium-macos-ia32-release.zip' ];
  +final DARTIUM_FILES = ['dartium/dartium-macos-ia32-release.zip',
  +                       'dartium/content_shell-macos-ia32-release.zip'];
   final FILES = []..addAll(SDK_FILES)..addAll(DARTIUM_FILES);
   
   
  
positive.code:     version '$devVersion'
      url '$urlBase/dev/release/${revisions['dev']}/$dartiumFile'
      sha256 '${hashes['dev'][dartiumFile]}'
    end
  
    def shim_script target
      <<-EOS.undent
        #!/bin/bash
        open "#{prefix}/#{target}" "\$@"
      EOS
    end
  
    def install
      prefix.install Dir['*']
      (bin+"dartium").write shim_script "Chromium.app"
    end
  
    def caveats; <<-EOS.undent
  
negative.code:                    String stableVersion) {
    final urlBase = 'https://storage.googleapis.com/dart-archive/channels';
    final dartiumFile = 'dartium/dartium-macos-ia32-release.zip';
    final contentShellFile = 'dartium/content_shell-macos-ia32-release.zip';
  
    return '''
  require 'formula'
  