Clang plugin to check that unstable types are not used in IPC.

ipc/ipc_message_templates.h

 // Copyright 2015 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_IPC_MESSAGE_TEMPLATES_H_
 #define IPC_IPC_MESSAGE_TEMPLATES_H_
 
 #include <stdint.h>
 
 #include <type_traits>
@@ skipping 149 matching lines @@
                        T* obj,
                        S* sender,
                        P* parameter,
                        Method func) {
     SendParam send_params;
     bool ok = ReadSendParam(msg, &send_params);
     Message* reply = SyncMessage::GenerateReply(msg);
     if (ok) {
       ReplyParam reply_params;
       base::DispatchToMethod(obj, func, send_params, &reply_params);
-      WriteParam(reply, reply_params);
+      WriteParamUnchecked(reply, reply_params);
       LogReplyParamsToMessage(reply_params, msg);
     } else {
       NOTREACHED() << "Error deserializing message " << msg->type();
       reply->set_reply_error();
     }
     sender->Send(reply);
     return ok;
   }
 
   template <class T, class P, class Method>
@@ skipping 20 matching lines @@
   MessageT(Routing routing, const Ins&... ins, Outs*... outs);
 };
 
 }  // namespace IPC
 
 #if defined(IPC_MESSAGE_IMPL)
 #include "ipc/ipc_message_templates_impl.h"
 #endif
 
 #endif  // IPC_IPC_MESSAGE_TEMPLATES_H_