Use udev for serial device enumeration on Linux

chrome/browser/extensions/api/serial/serial_port_enumerator_win.cc

-// Copyright (c) 2012 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.
-
-#include "chrome/browser/extensions/api/serial/serial_port_enumerator.h"
-
-#include <windows.h>
-
-#include "base/memory/scoped_ptr.h"
-#include "base/strings/string_util.h"
-#include "base/strings/stringprintf.h"
-#include "base/win/registry.h"
-
-namespace extensions {
-
-SerialPortEnumerator::StringSet
-SerialPortEnumerator::GenerateValidSerialPortNames() {
-  StringSet name_set;
-
-  base::win::RegistryValueIterator iter_key(HKEY_LOCAL_MACHINE,
-      L"HARDWARE\\DEVICEMAP\\SERIALCOMM\\");
-
-  for (; iter_key.Valid(); ++iter_key) {
-    base::string16 str(iter_key.Value());
-    std::string device_string(WideToASCII(str));
-    name_set.insert(device_string);
-  }
-  return name_set;
-}
-
-}  // namespace extensions