Revert 20127

tools/dom/templates/html/impl/impl_Window.darttemplate

 // 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.
 
 part of $LIBRARYNAME;
 
 $if DART2JS
 $(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS native "@*DOMWindow" {
 $else
 $(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
@@ skipping 207 matching lines @@
 $else
   /// Checks if _setImmediate is supported.
   static bool get _supportsSetImmediate => false;
 
   /// Dartium stub for IE's setImmediate.
   void _setImmediate(void callback()) {
     throw new UnsupportedError('setImmediate is not supported');
   }
 $endif
 
-  /**
-   * Access a sandboxed file system of the specified `size`. If `persistent` is
-   * true, the application will request permission from the user to create
-   * lasting storage. This storage cannot be freed without the user's
-   * permission. Returns a [Future] whose value stores a reference to the
-   * sandboxed file system for use. Because the file system is sandboxed,
-   * applications cannot access file systems created in other web pages. 
-   */
-  Future<FileSystem> requestFileSystem(int size, {bool persistent: false}) {
-    return _requestFileSystem(persistent? 1 : 0, size);
-  }
 $!MEMBERS
 }