Move directory creation functions to base namespace.

base/files/scoped_temp_dir.cc

Index: base/files/scoped_temp_dir.cc
diff --git a/base/files/scoped_temp_dir.cc b/base/files/scoped_temp_dir.cc
index 5624a061941361f1dadcce2bf7d9de877269accd..b893b02ca8ad933a39db58bac8aa16e4607668f1 100644
--- a/base/files/scoped_temp_dir.cc
+++ b/base/files/scoped_temp_dir.cc
@@ -34,7 +34,7 @@ bool ScopedTempDir::CreateUniqueTempDirUnderPath(const FilePath& base_path) {
     return false;
 
   // If |base_path| does not exist, create it.
-  if (!file_util::CreateDirectory(base_path))
+  if (!base::CreateDirectory(base_path))
     return false;
 
   // Create a new, uniquely named directory under |base_path|.
@@ -50,7 +50,7 @@ bool ScopedTempDir::Set(const FilePath& path) {
   if (!path_.empty())
     return false;
 
-  if (!DirectoryExists(path) && !file_util::CreateDirectory(path))
+  if (!DirectoryExists(path) && !base::CreateDirectory(path))
     return false;
 
   path_ = path;