Ensure that printer job handler is stopped and task_in_progress_ is reset in OnAuthError

BUG=138959
TEST=

Review URL: https://chromiumcodereview.appspot.com/10821014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@148485 0039d316-1c4b-4281-b951-d872f2087c98

chrome/service/cloud_print/printer_job_handler.cc

@@ -176,6 +176,8 @@ bool PrinterJobHandler::OnJobCompleted(JobStatusUpdater* updater) {
 }
 
 void PrinterJobHandler::OnAuthError() {
+  MessageLoop::current()->PostTask(
+      FROM_HERE, base::Bind(&PrinterJobHandler::Stop, this));
   if (delegate_)
     delegate_->OnAuthError();
 }