Switch to standard integer types in mojo/.

mojo/public/cpp/bindings/tests/serialization_warning_unittest.cc

 // 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.
 
 // Serialization warnings are only recorded in debug build.
 #ifndef NDEBUG
 
+#include <stddef.h>
+
 #include "mojo/public/cpp/bindings/array.h"
 #include "mojo/public/cpp/bindings/lib/array_internal.h"
 #include "mojo/public/cpp/bindings/lib/array_serialization.h"
 #include "mojo/public/cpp/bindings/lib/fixed_buffer.h"
 #include "mojo/public/cpp/bindings/lib/validation_errors.h"
 #include "mojo/public/cpp/bindings/string.h"
 #include "mojo/public/cpp/system/message_pipe.h"
 #include "mojo/public/interfaces/bindings/tests/serialization_test_structs.mojom.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 200 matching lines @@
   TestArrayWarning(test_array.Pass(),
                    mojo::internal::VALIDATION_ERROR_UNEXPECTED_ARRAY_HEADER,
                    &validate_params_2);
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace mojo
 
 #endif