Move directory creation functions to base namespace.

chrome/common/auto_start_linux.cc

Index: chrome/common/auto_start_linux.cc
diff --git a/chrome/common/auto_start_linux.cc b/chrome/common/auto_start_linux.cc
index 905114969349662dd48c383db6245ba50d99ee18..c9c3fcc9d19005c615dde655375103eb6bececf9 100644
--- a/chrome/common/auto_start_linux.cc
+++ b/chrome/common/auto_start_linux.cc
@@ -33,7 +33,7 @@ bool AutoStart::AddApplication(const std::string& autostart_filename,
   scoped_ptr<base::Environment> environment(base::Environment::Create());
   base::FilePath autostart_directory = GetAutostartDirectory(environment.get());
   if (!base::DirectoryExists(autostart_directory) &&
-      !file_util::CreateDirectory(autostart_directory)) {
+      !base::CreateDirectory(autostart_directory)) {
     return false;
   }