Generate the print messages in components/printing

components/printing/common/printing_param_traits_macros.h

Index: components/printing/common/printing_param_traits_macros.h
diff --git a/components/printing/common/printing_param_traits_macros.h b/components/printing/common/printing_param_traits_macros.h
new file mode 100644
index 0000000000000000000000000000000000000000..3ce6d9cb192cd0405d1ef7837668a075d8412d99
--- /dev/null
+++ b/components/printing/common/printing_param_traits_macros.h
@@ -0,0 +1,23 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.

[dcheng, 2015/01/27 18:36:57]

Mind updating OWNERS to cover this file as well?

Yes, this is a huge pain =(

[Vitaly Buka (NO REVIEWS), 2015/01/27 18:45:39]

it's already there

+// 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 COMPONENTS_PRINTING_COMMON_PRINTING_PARAM_TRAITS_MACROS_H_
+#define COMPONENTS_PRINTING_COMMON_PRINTING_PARAM_TRAITS_MACROS_H_
+
+#include "ipc/ipc_message_macros.h"
+#include "printing/print_job_constants.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  // COMPONENTS_PRINTING_COMMON_PRINTING_PARAM_TRAITS_MACROS_H_