Adding functionality to specify TLS encryption CUPS print servers for cloudprint connector.

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 {
 
 // Default port for IPP print servers.
 static const int kDefaultIPPServerPort = 631;
 
 // Helper wrapper around http_t structure, with connection and cleanup
 // functionality.
-HttpConnectionCUPS::HttpConnectionCUPS(const GURL& print_server_url)
+HttpConnectionCUPS::HttpConnectionCUPS(const GURL& print_server_url,
+                                       http_encryption_t encryption)
     : http_(NULL) {
   // If we have an empty url, use default print server.
   if (print_server_url.is_empty())
     return;
 
   int port = print_server_url.IntPort();
   if (port == url_parse::PORT_UNSPECIFIED)
     port = kDefaultIPPServerPort;
 
   http_ = httpConnectEncrypt(print_server_url.host().c_str(), port,
-                             HTTP_ENCRYPT_NEVER);
+                             encryption);
   if (http_ == NULL) {
     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