Fix compiling of sync on linux.

chrome/browser/sync/util/path_helpers_linux.cc

 // Copyright (c) 2009 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 <sys/types.h>
 
-#include <glib.h>
 #include <string.h>
 
 #include "base/logging.h"
 #include "base/port.h"
 #include "chrome/browser/sync/util/character_set_converters.h"
 #include "chrome/browser/sync/util/path_helpers.h"
 
 #ifndef OS_LINUX
 #error Compile this file on Linux only.
 #endif
@@ skipping 17 matching lines @@
   // linux.
   return path;
 }
 
 PathString AppendSlash(const PathString& path) {
   if ((!path.empty()) && (*path.rbegin() != '/')) {
     return path + '/';
   }
   return path;
 }
-
-PathString LowercasePath(const PathString& path) {
-  gchar* ret = g_utf8_strdown(path.c_str(), -1);
-  PathString retstr(ret);
-  g_free(ret);
-  return retstr;
-}