Use udev for serial device enumeration on Linux

chrome/browser/extensions/api/serial/serial_port_enumerator.h

-// 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.
-
-#ifndef CHROME_BROWSER_EXTENSIONS_API_SERIAL_SERIAL_PORT_ENUMERATOR_H_
-#define CHROME_BROWSER_EXTENSIONS_API_SERIAL_SERIAL_PORT_ENUMERATOR_H_
-
-#include <set>
-#include <string>
-
-#include "base/gtest_prod_util.h"
-
-FORWARD_DECLARE_TEST(SerialPortEnumeratorTest, ValidPortNamePatterns);
-FORWARD_DECLARE_TEST(SerialPortEnumeratorTest, InvalidPortNamePatterns);
-
-namespace extensions {
-
-class APIResourceEventNotifier;
-
-// Discovers and enumerates likely serial ports on the current machine.
-class SerialPortEnumerator {
- public:
-  typedef std::set<std::string> StringSet;
-
-  // Returns true if the given port name (e.g., "/dev/tty.usbmodemXXX") is in
-  // the supplied set of names of serial ports that exist on this machine.
-  static bool DoesPortExist(const StringSet& name_set,
-                            const std::string& port_name);
-
-  static StringSet GenerateValidSerialPortNames();
-
- private:
-  // Returns a StringSet of patterns to be used with MatchPattern.
-  static StringSet GenerateValidPatterns();
-
-  FRIEND_TEST_ALL_PREFIXES(::SerialPortEnumeratorTest, ValidPortNamePatterns);
-  FRIEND_TEST_ALL_PREFIXES(::SerialPortEnumeratorTest, InvalidPortNamePatterns);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_SERIAL_SERIAL_PORT_ENUMERATOR_H_