IOSurfaceLookupFromMachPort   56 ui/gl/io_surface_support_mac.cc   virtual CFTypeRef IOSurfaceLookupFromMachPort(mach_port_t port) OVERRIDE;
IOSurfaceLookupFromMachPort   49 ui/gl/io_surface_support_mac.h   virtual CFTypeRef IOSurfaceLookupFromMachPort(mach_port_t port) = 0;