Create a new print backend for the updated CUPS APIs

printing/backend/print_backend_chromeos.cc

Index: printing/backend/print_backend_chromeos.cc
diff --git a/printing/backend/print_backend_chromeos.cc b/printing/backend/print_backend_chromeos.cc
index 35f51b7ec6085e53069e76f3ad61971fe4009a1a..51bdacb7deb0f18a6411db500a93d5fa56c5a012 100644
--- a/printing/backend/print_backend_chromeos.cc
+++ b/printing/backend/print_backend_chromeos.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -10,7 +10,7 @@
 #include "url/gurl.h"
 
 #if defined(USE_CUPS)
-#include "printing/backend/print_backend_cups.h"
+#include "printing/backend/print_backend_cups_ipp.h"
 #endif  // defined(USE_CUPS)
 
 namespace printing {
@@ -93,9 +93,12 @@ scoped_refptr<PrintBackend> PrintBackend::CreateInstance(
       print_backend_settings->GetInteger(kCUPSEncryption, &encryption);
     }
     GURL print_server_url(print_server_url_str.c_str());
-    return new PrintBackendCUPS(print_server_url,
-                                static_cast<http_encryption_t>(encryption),
-                                cups_blocking == kValueTrue);
+
+    CupsConnection connection(print_server_url,

[Lei Zhang, 2016/07/13 01:08:43]

This should be an unique_ptr, and PrintBackendCupsIpp should store an
unique_ptr. https://google.github.io/styleguide/cppguide.html#Rvalue_references

[skau, 2016/07/14 20:43:06]

Thanks.  I somehow missed that in the style guide.

+                              static_cast<http_encryption_t>(encryption),
+                              cups_blocking == kValueTrue);
+
+    return new PrintBackendCupsIpp(std::move(connection));
 #endif  // defined(USE_CUPS)
   }