Test for WebKit bug 24735: Poor setDragImage support on Windows

Instructions:

When you drag the first div, the image under the cursor should be of the second image.

When you drag the first image, the image under the cursor should be of the second div.

Drag me, I am a div! (first div)

When a drag is started on the image, this is the div that is used as the drag image! (second div)