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

ipc/ipc_message_macros.h

Index: ipc/ipc_message_macros.h
===================================================================
--- ipc/ipc_message_macros.h	(revision 73235)
+++ ipc/ipc_message_macros.h	(working copy)
@@ -360,6 +360,25 @@
 // but it needs gcc 4.3 and xcode doesn't use it yet.  When that happens, switch
 // to it.
 
+#define IPC_STRUCT_FIRST(type, name, init) \
+  struct IPC_STRUCT_NAME { IPC_STRUCT_NAME (); ~IPC_STRUCT_NAME (); \
+    IPC_STRUCT_MEMBER(type, name)
+#define IPC_STRUCT_NEXT(type, name, init) \
+    IPC_STRUCT_MEMBER(type, name)
+#define IPC_STRUCT_LAST(type, name, init) \
+    IPC_STRUCT_MEMBER(type, name) \
+  }; \
+  namespace IPC { \
+    template <> \
+    struct ParamTraits<IPC_STRUCT_NAME> { \
+      typedef IPC_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_MEMBER(type, name) type name;
+
 #define IPC_MESSAGE_CONTROL0(msg_class) \
   class msg_class : public IPC::Message { \
    public: \