Implement serial API for Windows.

chrome/browser/extensions/api/serial/serial_port_enumerator_posix.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 "base/file_path.h"
 #include "base/file_util.h"
 #include "base/string_util.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 63 matching lines @@
   StringSet valid_patterns = GenerateValidPatterns();
   StringSet name_set;
   file_util::FileEnumerator enumerator(
       DEV_ROOT, false, FILES_AND_SYM_LINKS);
   do {
     const FilePath next_device_path(enumerator.Next());
     const std::string next_device = next_device_path.value();
     if (next_device.empty())
       break;
 
-    std::set<std::string>::const_iterator i = valid_patterns.begin();
+    StringSet::const_iterator i = valid_patterns.begin();
     for (; i != valid_patterns.end(); ++i) {
       if (MatchPattern(next_device, *i)) {
         name_set.insert(next_device);
         break;
       }
     }
   } while (true);
 
   return name_set;
 }
 
 }  // namespace extensions