Create a new print backend for the updated CUPS APIs

printing/backend/cups_deleters.cc

+// Copyright 2016 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_deleters.h"
+
+namespace printing {
+
+void HttpDeleter::operator()(http_t* http) const {
+  httpClose(http);
+}
+
+void DestinationDeleter::operator()(cups_dest_t* dest) const {
+  cupsFreeDests(1, dest);
+}
+
+void DestInfoDeleter::operator()(cups_dinfo_t* info) const {
+  cupsFreeDestInfo(info);
+}
+
+}  // namespace printing