It is time.

ui/base/dragdrop/drag_utils_mac.mm

Index: ui/base/dragdrop/drag_utils_mac.mm
diff --git a/ui/base/dragdrop/drag_utils_mac.mm b/ui/base/dragdrop/drag_utils_mac.mm
deleted file mode 100644
index 22171bde7fb1c12caa122755dec49d722785062a..0000000000000000000000000000000000000000
--- a/ui/base/dragdrop/drag_utils_mac.mm
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ui/base/dragdrop/drag_utils.h"
-
-#include "base/logging.h"
-
-namespace drag_utils {
-
-void SetDragImageOnDataObject(const gfx::Canvas& canvas,
-                              const gfx::Vector2d& cursor_offset,
-                              ui::OSExchangeData* data_object) {
-  NOTIMPLEMENTED();
-}
-
-void SetDragImageOnDataObject(const gfx::ImageSkia& image_skia,
-                              const gfx::Vector2d& cursor_offset,
-                              ui::OSExchangeData* data_object) {
-  NOTIMPLEMENTED();
-}
-
-}  // namespace drag_utils