Change 'bool world_readable' to an enum

util/file/file_writer.cc

Index: util/file/file_writer.cc
diff --git a/util/file/file_writer.cc b/util/file/file_writer.cc
index d6ab9e7c11b53e00634d25a7d125c77ddfb36f8a..4794c7f074ee47a1c648349f55829a5cef047b28 100644
--- a/util/file/file_writer.cc
+++ b/util/file/file_writer.cc
@@ -45,9 +45,9 @@ FileWriter::~FileWriter() {
 
 bool FileWriter::Open(const base::FilePath& path,
                       FileWriteMode write_mode,
-                      bool world_readable) {
+                      FilePermissions permissions) {
   CHECK(!file_.is_valid());
-  file_.reset(LoggingOpenFileForWrite(path, write_mode, world_readable));
+  file_.reset(LoggingOpenFileForWrite(path, write_mode, permissions));
   return file_.is_valid();
 }