Move Posix file utils to the base namespace.

chrome/browser/chromeos/drive/drive_integration_service.cc

Index: chrome/browser/chromeos/drive/drive_integration_service.cc
diff --git a/chrome/browser/chromeos/drive/drive_integration_service.cc b/chrome/browser/chromeos/drive/drive_integration_service.cc
index b5bdb7c725282b9aaac0d88826a8c88ab6904372..fa9a729f5571ba2a8b23779257baf90bcf293e26 100644
--- a/chrome/browser/chromeos/drive/drive_integration_service.cc
+++ b/chrome/browser/chromeos/drive/drive_integration_service.cc
@@ -112,11 +112,11 @@ FileError InitializeMetadata(
 
   // Change permissions of cache file directory to u+rwx,og+x (711) in order to
   // allow archive files in that directory to be mounted by cros-disks.
-  file_util::SetPosixFilePermissions(
+  base::SetPosixFilePermissions(
       cache_root_directory.Append(kCacheFileDirectory),
-      file_util::FILE_PERMISSION_USER_MASK |
-      file_util::FILE_PERMISSION_EXECUTE_BY_GROUP |
-      file_util::FILE_PERMISSION_EXECUTE_BY_OTHERS);
+      base::FILE_PERMISSION_USER_MASK |
+      base::FILE_PERMISSION_EXECUTE_BY_GROUP |
+      base::FILE_PERMISSION_EXECUTE_BY_OTHERS);
 
   internal::ResourceMetadataStorage::UpgradeOldDB(
       metadata_storage->directory_path(), id_canonicalizer);