Add a preference that can disable the fake SYSV SHM shim https://bugs.webkit.org/show_bug.cgi?id=116127 <rdar://problem/13810524> Patch by Simon Cooper <scooper@apple.com> on 2013-05-14 Reviewed by Alexey Proskuryakov. * PluginProcess/mac/PluginProcessShim.mm: (WebKit::shim_disabled): (WebKit::shim_shmdt): (WebKit::shim_shmat): (WebKit::shim_shmget): (WebKit::shim_shmctl): git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150094 268f45cc-cd09-0410-ab3c-d52691b4dbfc