It is time.

ui/base/clipboard/custom_data_helper_mac.mm

Index: ui/base/clipboard/custom_data_helper_mac.mm
diff --git a/ui/base/clipboard/custom_data_helper_mac.mm b/ui/base/clipboard/custom_data_helper_mac.mm
deleted file mode 100644
index ae4362194f8e1958a3bc4d3e146cda981baa0a22..0000000000000000000000000000000000000000
--- a/ui/base/clipboard/custom_data_helper_mac.mm
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright (c) 2011 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/clipboard/custom_data_helper.h"
-
-#import <Foundation/Foundation.h>
-
-namespace ui {
-
-// TODO(dcheng): This name is temporary. See crbug.com/106449.
-#if defined(USE_AURA)
-const char kMimeTypeWebCustomData[] = "chromium/x-web-custom-data";
-#else
-NSString* const kWebCustomDataPboardType = @"org.chromium.web-custom-data";
-#endif
-
-}  // namespace ui