Generate the print messages in components/printing

printing/printing_param_traits_macros.h

Index: printing/printing_param_traits_macros.h
diff --git a/printing/printing_param_traits_macros.h b/printing/printing_param_traits_macros.h
new file mode 100644
index 0000000000000000000000000000000000000000..42aa80817a4aa8919459de41f2fedc0d30756cba
--- /dev/null
+++ b/printing/printing_param_traits_macros.h
@@ -0,0 +1,23 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.

[dcheng, 2015/01/23 23:01:53]

Please add an OWNERS file and add set noparent rules for IPC reviewers for this
file.

[dgn, 2015/01/26 10:02:09]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Singly or multiply-included shared traits file depending on circumstances.
+// This allows the use of printing IPC serialization macros in more than one IPC
+// message file.
+#ifndef PRINTING_PRINTING_PARAM_TRAITS_MACROS_H_
+#define PRINTING_PRINTING_PARAM_TRAITS_MACROS_H_
+
+#include "printing/print_job_constants.h"
+#include "ipc/ipc_message_macros.h"
+
+// TODO(dgn) move all those macros back to
+// components/printing/common/print_messages.h when they can be handled by a
+// single generator. (main tracking bug: crbug.com/450822)
+IPC_ENUM_TRAITS_MAX_VALUE(printing::MarginType,
+                          printing::MARGIN_TYPE_LAST)
+IPC_ENUM_TRAITS_MIN_MAX_VALUE(printing::DuplexMode,
+                              printing::UNKNOWN_DUPLEX_MODE,
+                              printing::SHORT_EDGE)
+
+#endif  // PRINTING_PRINTING_PARAM_TRAITS_MACROS_H_