Reviewed by Sam Weinig.

        Get and paint each individual rect in -[WKView drawRect:]
        https://bugs.webkit.org/show_bug.cgi?id=52660

        * UIProcess/API/mac/WKView.mm:
        (-[WKView drawRect:]):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@76054 268f45cc-cd09-0410-ab3c-d52691b4dbfc