[iOS] Multisampling is not available on iOS

* platform/graphics/mac/GraphicsContext3DMac.mm:
(WebCore::GraphicsContext3D::GraphicsContext3D):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@161759 268f45cc-cd09-0410-ab3c-d52691b4dbfc
2 files changed