Mojo cpp bindings: add support for validating incoming messages.

mojo/public/cpp/bindings/lib/message_header_validator.h

 // Copyright 2014 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 MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_HEADER_VALIDATOR_H_

[darin (slow to review), 2014/05/15 05:47:29]

oops, thanks!

+#define MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_HEADER_VALIDATOR_H_
+
 #include "mojo/public/cpp/bindings/message.h"
+#include "mojo/public/cpp/bindings/message_filter.h"
 
 namespace mojo {
 namespace internal {
 
-class MessageHeaderValidator : public MessageReceiver {
+class MessageHeaderValidator : public MessageFilter {
  public:
-  explicit MessageHeaderValidator(MessageReceiver* next);
+  explicit MessageHeaderValidator(MessageReceiver* sink = NULL);
 
   virtual bool Accept(Message* message) MOJO_OVERRIDE;
-  virtual bool AcceptWithResponder(Message* message, MessageReceiver* responder)
-      MOJO_OVERRIDE;
-
- private:
-  MessageReceiver* next_;
 };
 
 }  // namespace internal
 }  // namespace mojo
+
+#endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_HEADER_VALIDATOR_H_