gdata: Get rid of chmod() system call from gdata code

chrome/browser/chromeos/gdata/gdata_cache_metadata.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/chromeos/gdata/gdata_cache_metadata.h"
 
 #include "base/file_util.h"
 #include "chrome/browser/chromeos/gdata/gdata_util.h"
 
 namespace gdata {
 
 namespace {
 
-// Changes the permissions of |file_path| to |permissions|.
-bool ChangeFilePermissions(const FilePath& file_path, mode_t permissions) {
-  if (HANDLE_EINTR(chmod(file_path.value().c_str(), permissions)) != 0) {
-    PLOG(ERROR) << "Error changing permissions of " << file_path.value();
-    return false;
-  }
-  DVLOG(1) << "Changed permissions of " << file_path.value();
-  return true;
-}
-
 // Returns true if |file_path| is a valid symbolic link as |sub_dir_type|.
 // Otherwise, returns false with the reason.
 bool IsValidSymbolicLink(const FilePath& file_path,
                          GDataCache::CacheSubDirectoryType sub_dir_type,
                          const std::vector<FilePath>& cache_paths,
                          std::string* reason) {
   DCHECK(sub_dir_type == GDataCache::CACHE_TYPE_PINNED ||
          sub_dir_type == GDataCache::CACHE_TYPE_OUTGOING);
 
   FilePath destination;
@@ skipping 98 matching lines @@
   if (cache_paths.size() < GDataCache::NUM_CACHE_TYPES) {
     LOG(ERROR) << "Size of cache_paths is invalid.";
     return;
   }
 
   if (!GDataCache::CreateCacheDirectories(cache_paths))
     return;
 
   // Change permissions of cache persistent directory to u+rwx,og+x in order to
   // allow archive files in that directory to be mounted by cros-disks.
-  if (!ChangeFilePermissions(cache_paths[GDataCache::CACHE_TYPE_PERSISTENT],
-                             S_IRWXU | S_IXGRP | S_IXOTH))
+  if (!file_util::SetPosixFilePermissions(
+        cache_paths[GDataCache::CACHE_TYPE_PERSISTENT],
+        S_IRWXU | S_IXGRP | S_IXOTH))
     return;
 
   DVLOG(1) << "Scanning directories";
 
   // Scan cache persistent and tmp directories to enumerate all files and create
   // corresponding entries for cache map.
   ResourceIdToFilePathMap persistent_file_map;
   ScanCacheDirectory(cache_paths,
                      GDataCache::CACHE_TYPE_PERSISTENT,
                      &cache_map_,
@@ skipping 254 matching lines @@
     // If the MD5 matching is not requested, don't check MD5.
     return true;
   } else if (md5 == cache_entry.md5) {
     // Otherwise, compare the MD5.
     return true;
   }
   return false;
 }
 
 }  // namespace gdata