Use "self" not "window" for Worker API.

dart/tools/dom/templates/html/dart2js/impl_URL.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;
 
 $(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
 
   static String createObjectUrl(blob_OR_source_OR_stream) =>
       JS('String',
-         '(window.URL || window.webkitURL).createObjectURL(#)',
+         '(self.URL || self.webkitURL).createObjectURL(#)',

[blois, 2013/05/13 17:47:52]

I believe it should probably be:

"(#.URL || #.webkitURL).createObjectURL(#)", window, window,
blob_OR_source_OR_stream)

[ahe, 2013/05/13 18:32:22]

That doesn't seem to work.  It generates this code (which fails the test):

      t2 = window;
      t3 = window;
      url0 = (t2.URL || t3.webkitURL).createObjectURL(t1);

Also, the implementation of window is:

Window get window => JS('Window', 'window');

In a Web Worker, "self" refers to a WorkerGlobalScope which is either a
DedicatedWorkerGlobalScope or a SharedWorkerGlobalScope.  In normal JavaScript,
self===window.

See:

http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html#the-...

https://developer.mozilla.org/en-US/docs/DOM/Using_web_workers

          blob_OR_source_OR_stream);
 
   static void revokeObjectUrl(String objectUrl) =>
       JS('void',
-         '(window.URL || window.webkitURL).revokeObjectURL(#)', objectUrl);
+         '(self.URL || self.webkitURL).revokeObjectURL(#)', objectUrl);
 $!MEMBERS
 }