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