[BlackBerry] Only clear credentials when purgeCredentials is called
https://bugs.webkit.org/show_bug.cgi?id=107124

Patch by Joe Mason <jmason@rim.com> on 2013-01-18
Reviewed by Yong Li.

Stop clearing credentials when sending out a request just in case they're wrong. That's stupid and
has race conditions. Only clear them when we know they're wrong.

Internal PR: 231158
Internal Reviewer: George Staikos

* platform/network/blackberry/NetworkJob.cpp:
(WebCore::NetworkJob::sendRequestWithCredentials):
(WebCore::NetworkJob::purgeCredentials):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@140164 268f45cc-cd09-0410-ab3c-d52691b4dbfc