Add a new reliability test crash in URLRequestHttpJob::Factory to known_crashes.txt

BUG=21862
TEST=none

Review URL: http://codereview.chromium.org/206010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@26222 0039d316-1c4b-4281-b951-d872f2087c98

chrome/test/data/reliability/known_crashes.txt

@@ -123,3 +123,6 @@ PREFIX: renderviewhost::setnavigationssuspended___renderviewhostmanager::shouldc
 # bug 21520 from [25874:25879]
 PREFIX: renderviewhost::executejavascriptinwebframe___domui::calljavascriptfunction___downloadsdomhandler::sendcurrentdownloads
 PREFIX: deletetask<urlfetcher>::run
+
+# 21862
+urlrequesthttpjob::factory___urlrequestjobmanager::createjob___urlrequest::start