First round of dead file removal

experimental/c_salt/npapi/scoped_npid_to_string_converter.cc

-// Copyright 2010 The Native Client Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can
-// be found in the LICENSE file.
-
-#include "c_salt/npapi/scoped_npid_to_string_converter.h"
-
-namespace c_salt {
-namespace npapi {
-
-ScopedNPIdToStringConverter::ScopedNPIdToStringConverter(
-    const NPIdentifier& np_id) : np_string_(NPN_UTF8FromIdentifier(np_id)) {
-  string_value_ = static_cast<const char*>(np_string_);
-}
-
-ScopedNPIdToStringConverter::~ScopedNPIdToStringConverter() {
-  NPN_MemFree(np_string_);
-}
-
-const std::string& ScopedNPIdToStringConverter::string_value() const {
-  return string_value_;
-}
-
-}  // namespace npapi
-}  // namespace c_salt