[mojo] Add Mojo bindings support for IPC::ParamTraits

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

 // 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.
 
 #ifndef MOJO_PUBLIC_CPP_BINDINGS_LIB_VALIDATION_UTIL_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_VALIDATION_UTIL_H_
 
 #include <stdint.h>
 
 #include "mojo/public/cpp/bindings/lib/bindings_internal.h"
@@ skipping 98 matching lines @@
                     BoundsChecker* bounds_checker) {
   if (!ValidateEncodedPointer(&input.offset)) {
     ReportValidationError(VALIDATION_ERROR_ILLEGAL_POINTER);
     return false;
   }
 
   return T::Validate(DecodePointerRaw(&input.offset), bounds_checker);
 }
 
 template <typename T>
+bool ValidateNative(const NativePointer<T>& input,
+                    BoundsChecker* bounds_checker) {
+  if (!ValidateEncodedPointer(&input.offset)) {
+    ReportValidationError(VALIDATION_ERROR_ILLEGAL_POINTER);
+    return false;
+  }
+
+  // Native types perform validation during deserialization.
+  DecodePointerRaw(&input.offset);
+  return true;
+}
+
+template <typename T>
 bool ValidateInlinedUnion(const T& input, BoundsChecker* bounds_checker) {
   return T::Validate(&input, bounds_checker, true);
 }
 
 bool ValidateHandle(const Handle& input, BoundsChecker* bounds_checker);
 
 bool ValidateAssociatedInterfaceId(InterfaceId input);
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_VALIDATION_UTIL_H_