Mojo cpp bindings: add support for validating incoming messages.

mojo/public/cpp/bindings/lib/interface_impl_internal.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_INTERFACE_IMPL_INTERNAL_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_INTERFACE_IMPL_INTERNAL_H_
 
 #include "mojo/public/cpp/bindings/error_handler.h"
 #include "mojo/public/cpp/bindings/interface_ptr.h"
+#include "mojo/public/cpp/bindings/lib/filter_chain.h"
+#include "mojo/public/cpp/bindings/lib/message_header_validator.h"
 #include "mojo/public/cpp/system/macros.h"
 
 namespace mojo {
 namespace internal {
 
 template <typename Interface>
 class InterfaceImplState : public ErrorHandler {
  public:
   typedef typename Interface::Client Client;
 
@@ skipping 18 matching lines @@
       MojoAsyncWaiter* waiter = GetDefaultAsyncWaiter()) {
     MessagePipe pipe;
     ptr->Bind(pipe.handle0.Pass(), waiter);
     Bind(pipe.handle1.Pass(), waiter);
   }
 
   void Bind(ScopedMessagePipeHandle handle,
             MojoAsyncWaiter* waiter) {
     assert(!router_);
 
-    router_ = new Router(handle.Pass(), waiter);
+    FilterChain filters;
+    filters.Append(new MessageHeaderValidator)
+           .Append(new typename Interface::RequestValidator_)
+           .Append(new typename Interface::Client::ResponseValidator_);
+
+    router_ = new Router(handle.Pass(), filters.Pass(), waiter);
     router_->set_incoming_receiver(&stub_);
     router_->set_error_handler(this);
 
     proxy_ = new typename Client::Proxy_(router_);
 
     stub_.sink()->SetClient(proxy_);
   }
 
   Router* router() { return router_; }
 
   void set_client(Client* client) { client_ = client; }
   Client* client() { return client_; }
 
  private:
   virtual void OnConnectionError() MOJO_OVERRIDE {
     static_cast<WithErrorHandler<Interface>*>(stub_.sink())->
         OnConnectionError();
   }
 
-  internal::Router* router_;
+  Router* router_;
   Client* client_;
   typename Client::Proxy_* proxy_;
   typename Interface::Stub_ stub_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(InterfaceImplState);
 };
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_INTERFACE_IMPL_INTERNAL_H_