Mojo: Add NotifyBadMessage API

mojo/public/cpp/bindings/lib/interface_endpoint_client.cc

 // 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.
 
 #include "mojo/public/cpp/bindings/lib/interface_endpoint_client.h"
 
 #include <stdint.h>
 
 #include <utility>
 
@@ skipping 238 matching lines @@
     sync_responses_.erase(iter);
   }
 
   // Return true means that we take ownership of |responder|.
   return true;
 }
 
 bool InterfaceEndpointClient::HandleIncomingMessage(Message* message) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
-  return payload_validator_->Accept(message);
+  if (!payload_validator_->Accept(message)) {
+    message->NotifyBadMessage(interface_name_);

[yzshen1, 2016/06/11 00:10:59]

If you think it is useful, we can also record the message type (which is the
ordinal number of the method).

+    return false;
+  }
+
+  return true;
 }
 
 void InterfaceEndpointClient::NotifyError() {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   if (encountered_error_)
     return;
   encountered_error_ = true;
   error_handler_.Run();
 }
@@ skipping 33 matching lines @@
   } else {
     if (!incoming_receiver_)
       return false;
 
     return incoming_receiver_->Accept(message);
   }
 }
 
 }  // namespace internal
 }  // namespace mojo