Make the implementation .cc files go away, instead have the authors give us a...

ipc/param_traits_macros.h

+// Copyright (c) 2011 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.
+
+#ifndef IPC_PARAM_TRAITS_MACROS_H_
+#define IPC_PARAM_TRAITS_MACROS_H_
+
+#include <string>
+
+// Traits generation for structs.
+#define IPC_STRUCT_TRAITS_BEGIN(struct_name) \
+  namespace IPC { \
+    template <> \
+    struct ParamTraits<struct_name> { \
+      typedef struct_name param_type; \
+      static void Write(Message* m, const param_type& p); \
+      static bool Read(const Message* m, void** iter, param_type* p); \
+      static void Log(const param_type& p, std::string* l); \
+    }; \
+  }
+
+#define IPC_STRUCT_TRAITS_MEMBER(name)
+#define IPC_STRUCT_TRAITS_END()
+
+// Traits generation for enums.
+#define IPC_ENUM_TRAITS(enum_name) \
+  namespace IPC { \
+    template <> \
+    struct ParamTraits<enum_name> { \
+      typedef enum_name param_type; \
+      static void Write(Message* m, const param_type& p); \
+      static bool Read(const Message* m, void** iter, param_type* p); \
+      static void Log(const param_type& p, std::string* l); \
+    }; \
+  }
+
+#endif  // IPC_PARAM_TRAITS_MACROS_H_
+