Move temp file functions to base namespace.

chrome/browser/chromeos/file_manager/file_watcher_unittest.cc

Index: chrome/browser/chromeos/file_manager/file_watcher_unittest.cc
diff --git a/chrome/browser/chromeos/file_manager/file_watcher_unittest.cc b/chrome/browser/chromeos/file_manager/file_watcher_unittest.cc
index 4fd583a681cb9d18983d4e1fe0c916a409a1c2b9..71af73f87b6fc826c2808319c4b084464b6ae1d8 100644
--- a/chrome/browser/chromeos/file_manager/file_watcher_unittest.cc
+++ b/chrome/browser/chromeos/file_manager/file_watcher_unittest.cc
@@ -138,8 +138,7 @@ TEST_F(FileManagerFileWatcherTest, WatchLocalFile) {
   // Create a temporary file in the temporary directory. The file watcher
   // should detect the change in the directory.
   base::FilePath temp_file_path;
-  ASSERT_TRUE(file_util::CreateTemporaryFileInDir(temp_dir.path(),
-                                                  &temp_file_path));
+  ASSERT_TRUE(base::CreateTemporaryFileInDir(temp_dir.path(), &temp_file_path));
   // Wait until the directory change is notified.
   run_loop.Run();
   ASSERT_FALSE(on_change_error);