[Qt] [WK2] Crash in Connection::readyReadHandler() on socket error

[Qt] [WK2] Crash in Connection::readyReadHandler() on socket error
https://bugs.webkit.org/show_bug.cgi?id=72392

Patch by Viatcheslav Ostapenko <ostapenko.viatcheslav@nokia.com> on 2011-11-16
Reviewed by Simon Hausmann.

Add QWeakPointer to SocketNotifierResourceGuard::m_socketNotifier to track
deallocation of referenced object.

* Platform/CoreIPC/unix/ConnectionUnix.cpp:
(CoreIPC::SocketNotifierResourceGuard::SocketNotifierResourceGuard):
(CoreIPC::SocketNotifierResourceGuard::~SocketNotifierResourceGuard):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@100455 268f45cc-cd09-0410-ab3c-d52691b4dbfc