AudioBus::loadPlatformResource should mmap file on Mac port.
Created attachment 118836 [details] Patch
Created attachment 118896 [details] Patch Rebased patch against ToT.
Committed r104858: <http://trac.webkit.org/changeset/104858>
This patch broke Snow Leopard builds. NSDataReadingMappedIfSafe isn't defined in 10.6 and earlier versions of Mac OS X.
http://build.webkit.org/builders/SnowLeopard%20Intel%20Release%20%28Build%29/builds/37692/steps/compile-webkit/logs/stdio
Fix coming.