It is time.

ui/base/clipboard/clipboard_constants.cc

Index: ui/base/clipboard/clipboard_constants.cc
diff --git a/ui/base/clipboard/clipboard_constants.cc b/ui/base/clipboard/clipboard_constants.cc
deleted file mode 100644
index 2d499dcf4d0b828c2126ca4efbe2fb075ee3a6e3..0000000000000000000000000000000000000000
--- a/ui/base/clipboard/clipboard_constants.cc
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2013 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/clipboard.h"
-
-namespace ui {
-
-const char Clipboard::kMimeTypeText[] = "text/plain";
-const char Clipboard::kMimeTypeURIList[] = "text/uri-list";
-const char Clipboard::kMimeTypeDownloadURL[] = "downloadurl";
-const char Clipboard::kMimeTypeHTML[] = "text/html";
-const char Clipboard::kMimeTypeRTF[] = "text/rtf";
-const char Clipboard::kMimeTypePNG[] = "image/png";
-
-}  // namespace ui