base: get rid of RealPath() function

base/files/file_util_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 "base/files/file_util.h"
 
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <libgen.h>
@@ skipping 69 matching lines @@
   ThreadRestrictions::AssertIOAllowed();
   return stat64(path, sb);
 }
 static int CallLstat(const char *path, stat_wrapper_t *sb) {
   ThreadRestrictions::AssertIOAllowed();
   return lstat64(path, sb);
 }
 #endif  // !(defined(OS_BSD) || defined(OS_MACOSX) || defined(OS_NACL))
 
 #if !defined(OS_NACL_NONSFI)
-// Helper for NormalizeFilePath(), defined below.
-bool RealPath(const FilePath& path, FilePath* real_path) {
-  ThreadRestrictions::AssertIOAllowed();  // For realpath().
-  FilePath::CharType buf[PATH_MAX];
-  if (!realpath(path.value().c_str(), buf))
-    return false;
-
-  *real_path = FilePath(buf);
-  return true;
-}
-
 // Helper for VerifyPathControlledByUser.
 bool VerifySpecificPathControlledByUser(const FilePath& path,
                                         uid_t owner_uid,
                                         const std::set<gid_t>& group_gids) {
   stat_wrapper_t stat_info;
   if (CallLstat(path.value().c_str(), &stat_info) != 0) {
     DPLOG(ERROR) << "Failed to get information on path "
                  << path.value();
     return false;
   }
@@ skipping 559 matching lines @@
     if (!DirectoryExists(*i)) {
       if (error)
         *error = File::OSErrorToFileError(saved_errno);
       return false;
     }
   }
   return true;
 }
 
 bool NormalizeFilePath(const FilePath& path, FilePath* normalized_path) {
-  FilePath real_path_result;
-  if (!RealPath(path, &real_path_result))
+  FilePath real_path_result = MakeAbsoluteFilePath(path);
+  if (real_path_result.empty())
     return false;
 
   // To be consistant with windows, fail if |real_path_result| is a
   // directory.
   stat_wrapper_t file_info;
   if (CallStat(real_path_result.value().c_str(), &file_info) != 0 ||
       S_ISDIR(file_info.st_mode))
     return false;
 
   *normalized_path = real_path_result;
@@ skipping 327 matching lines @@
     return false;
 
   DeleteFile(from_path, true);
   return true;
 }
 
 }  // namespace internal
 
 #endif  // !defined(OS_NACL_NONSFI)
 }  // namespace base