Mojo cpp bindings: add support for validating incoming messages.

mojo/public/cpp/bindings/no_interface.h

Index: mojo/public/cpp/bindings/no_interface.h
diff --git a/mojo/public/cpp/bindings/no_interface.h b/mojo/public/cpp/bindings/no_interface.h
index 02682d4b00445ec35cf3355438a27a7fda1d414d..73d21c24f3d2c5faef3afa94cfdba3fceedd38c1 100644
--- a/mojo/public/cpp/bindings/no_interface.h
+++ b/mojo/public/cpp/bindings/no_interface.h
@@ -8,6 +8,7 @@
 #include <assert.h>
 
 #include "mojo/public/cpp/bindings/message.h"
+#include "mojo/public/cpp/bindings/message_filter.h"
 #include "mojo/public/cpp/system/core.h"
 
 namespace mojo {
@@ -22,6 +23,8 @@ class NoInterface {
  public:
   typedef NoInterfaceProxy Proxy_;
   typedef NoInterfaceStub Stub_;
+  typedef NullFilter RequestValidator_;
+  typedef NullFilter ResponseValidator_;
   typedef NoInterface Client_;
   virtual ~NoInterface() {}
   virtual void SetClient(NoInterface* client) {}