Remove support for NPObjects.

content/child/npapi/npruntime_util.h

-// Copyright (c) 2013 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 CONTENT_CHILD_NPAPI_NPRUNTIME_UTIL_H_
-#define CONTENT_CHILD_NPAPI_NPRUNTIME_UTIL_H_
-
-#include "third_party/npapi/bindings/npruntime.h"
-
-namespace base {
-class Pickle;
-class PickleIterator;
-}
-
-namespace content {
-
-// Efficiently serialize/deserialize a NPIdentifier
-bool SerializeNPIdentifier(NPIdentifier identifier, base::Pickle* pickle);
-bool DeserializeNPIdentifier(base::PickleIterator* pickle_iter,
-                             NPIdentifier* identifier);
-
-}  // namespace content
-
-#endif  // CONTENT_CHILD_NPAPI_NPRUNTIME_UTIL_H_