cupsGetPPD got stuck sometime for an infinite time due to network configurati...

printing/backend/cups_helper.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "printing/backend/cups_helper.h"
 
 #include "base/logging.h"
 #include "googleurl/src/gurl.h"
 
 namespace printing {
@@ skipping 19 matching lines @@
     LOG(ERROR) << "CP_CUPS: Failed connecting to print server: " <<
                print_server_url;
   }
 }
 
 HttpConnectionCUPS::~HttpConnectionCUPS() {
   if (http_ != NULL)
     httpClose(http_);
 }
 
+void HttpConnectionCUPS::SetBlocking(bool blocking) {
+  httpBlocking(http_, blocking ?  1 : 0);
+}
+
 http_t* HttpConnectionCUPS::http() {
   return http_;
 }
 
 }  // namespace printing