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

ipc/ipc_message_templates_impl.h

Index: ipc/ipc_message_templates_impl.h
diff --git a/ipc/ipc_message_templates_impl.h b/ipc/ipc_message_templates_impl.h
index bfcdad016fabaff7e751ce03025aba2551631e20..0446fefd574703f791d3580b9ef4b2515ce549a3 100644
--- a/ipc/ipc_message_templates_impl.h
+++ b/ipc/ipc_message_templates_impl.h
@@ -24,7 +24,7 @@ template <typename Meta, typename... Ins>
 MessageT<Meta, base::Tuple<Ins...>, void>::MessageT(Routing routing,
                                                     const Ins&... ins)
     : Message(routing.id, ID, PRIORITY_NORMAL) {
-  WriteParam(this, base::MakeRefTuple(ins...));
+  WriteParamUnchecked(this, base::MakeRefTuple(ins...));
 }
 
 template <typename Meta, typename... Ins>
@@ -57,7 +57,7 @@ MessageT<Meta, base::Tuple<Ins...>, base::Tuple<Outs...>>::MessageT(
           ID,
           PRIORITY_NORMAL,
           new ParamDeserializer<Outs...>(base::MakeRefTuple(*outs...))) {
-  WriteParam(this, base::MakeRefTuple(ins...));
+  WriteParamUnchecked(this, base::MakeRefTuple(ins...));
 }
 
 template <typename Meta, typename... Ins, typename... Outs>
@@ -81,7 +81,7 @@ void MessageT<Meta,
               base::Tuple<Ins...>,
               base::Tuple<Outs...>>::WriteReplyParams(Message* reply,
                                                       const Outs&... outs) {
-  WriteParam(reply, base::MakeRefTuple(outs...));
+  WriteParamUnchecked(reply, base::MakeRefTuple(outs...));
 }
 
 template <typename Meta, typename... Ins, typename... Outs>