Fix compilation error in GTK WebKit2.

        * Platform/CoreIPC/gtk/ConnectionGtk.cpp:
        (CoreIPC::readBytesFromSocket):
        (CoreIPC::writeBytesToSocket):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@76252 268f45cc-cd09-0410-ab3c-d52691b4dbfc