Move temp file functions to base namespace.

chrome/test/chromedriver/session_commands.cc

Index: chrome/test/chromedriver/session_commands.cc
diff --git a/chrome/test/chromedriver/session_commands.cc b/chrome/test/chromedriver/session_commands.cc
index 85809f6e04f9e38e2294500935a4e96e4e91e292..8e0ef6b9ade7e4ef8e13696f5e7ace52f7f68fe1 100644
--- a/chrome/test/chromedriver/session_commands.cc
+++ b/chrome/test/chromedriver/session_commands.cc
@@ -592,8 +592,9 @@ Status ExecuteUploadFile(
       return Status(kUnknownError, "unable to create temp dir");
   }
   base::FilePath upload_dir;
-  if (!file_util::CreateTemporaryDirInDir(
-          session->temp_dir.path(), FILE_PATH_LITERAL("upload"), &upload_dir)) {
+  if (!base::CreateTemporaryDirInDir(session->temp_dir.path(),
+                                     FILE_PATH_LITERAL("upload"),
+                                     &upload_dir)) {
     return Status(kUnknownError, "unable to create temp dir");
   }
   std::string error_msg;