This never worked correctly. The texture loses multisample status when the resolve occurs. We never had code to re-establish it. Also, we'd have to handle the case where you resolve but then want to render to it again without clearing.
Review URL: http://codereview.appspot.com/4274074/
git-svn-id: http://skia.googlecode.com/svn/trunk@974 2bbb7eff-a529-9590-31e7-b0007b416f81