Update dart:chrome to include fileSystem, and update summary docs.

tools/dom/scripts/chromegenerator.py

 #!/usr/bin/python
 # Copyright (c) 2012, 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.
 
 """This module generates Dart Chrome APIs from the Chrome IDL files."""
 
 import sys
 import os
 
@@ skipping 18 matching lines @@
 # The content to fill OUTPUT_TEMPLATE with. Will be followed by a list of the
 # names of the generated .dart files.
 TEMPLATE_CONTENT = """
 // Copyright (c) 2013, 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.
 
 // DO NOT EDIT
 // Auto-generated dart:chrome library.
 
-/// Native wrappers for the Chrome Packaged App APIs.
+/// Native wrappers for the Chrome packaged app APIs.
 ///
-/// These functions allow direct access to the Packaged App APIs, allowing
-/// Chrome Packaged Apps to be written using Dart.
+/// These functions allow direct access to the chrome.* APIs, allowing
+/// Chrome packaged apps to be written using Dart.
 ///
-/// For more information on these APIs, see the Chrome.* APIs Documentation:
-///   http://developer.chrome.com/extensions/api_index.html
+/// For more information on these APIs, see the
+/// [chrome.* API documentation](http://developer.chrome.com/apps/api_index.html).
 library chrome;
 
 import 'dart:_foreign_helper' show JS;
 /* TODO(sashab): Add "show convertDartClosureToJS" once 'show' works. */
 import 'dart:_js_helper';
 import 'dart:html_common';
 import 'dart:html';
 
 part "$AUXILIARY_DIR/chrome/utils.dart";
 part "$AUXILIARY_DIR/chrome/chrome.dart";
@@ skipping 31 matching lines @@
 
   # Generate the template.
   files_to_add = (TEMPLATE_FILE_FORMAT % os.path.splitext(f)[0]
                   for f in API_FILES)
   with open(OUTPUT_TEMPLATE, 'w') as template_file:
     template_file.write(TEMPLATE_CONTENT)
     template_file.write('\n'.join(files_to_add))
   print "Generated template succesfully."