[BlackBerry] Provide more specific error description for SocketStreamError
https://bugs.webkit.org/show_bug.cgi?id=114134

Patch by Seokju Kwon <seokju.kwon@gmail.com> on 2013-04-08
Reviewed by Rob Buis.

Pass the reason of a failure to SocketStreamError instance
and notify it via SocketStreamHandleClient::didFailSocketStream().

* platform/network/blackberry/SocketStreamError.h:
(WebCore::SocketStreamError::SocketStreamError):
* platform/network/blackberry/SocketStreamHandleBlackBerry.cpp:
(WebCore::SocketStreamHandle::notifyStatusReceived):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147915 268f45cc-cd09-0410-ab3c-d52691b4dbfc