REGRESSION (r116645): Versions app's UI is munged in HiDPI due to background-size being reset to 'auto' when background short-hand is also specified
<rdar://problem/13614212>
Created attachment 198771 [details] Patch
Comment on attachment 198771 [details] Patch r=me
Committed r148712: <http://trac.webkit.org/changeset/148712>