Switch to standard integer types in mojo/.

mojo/public/cpp/bindings/lib/pickle_buffer.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_PICKLE_BUFFER_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_PICKLE_BUFFER_H_
 
+#include <stddef.h>
+
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/pickle.h"
 #include "mojo/public/cpp/bindings/lib/buffer.h"
 
 namespace mojo {
 namespace internal {
 
 // An implementation of Buffer which uses base::Pickle for its backing. Note
 // that this does not use Pickle's header structure at all, instead storing
@@ skipping 26 matching lines @@
 
   scoped_ptr<Storage> storage_;
 
   DISALLOW_COPY_AND_ASSIGN(PickleBuffer);
 };
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_PICKLE_BUFFER_H_