r82780 added support for a new eventSender.scalePageBy function to DRT/mac. We should implement this on Windows, too, so that we can run the tests that require it!
Another test that requires this feature: http://trac.webkit.org/changeset/87205
I suggest we move scalePageBy to window.internal.
(In reply to comment #2) > I suggest we move scalePageBy to window.internal. Looks like this was done! *** This bug has been marked as a duplicate of bug 64512 ***