It is time.

ui/accessibility/extensions/highcontrast/highcontrast.css

Index: ui/accessibility/extensions/highcontrast/highcontrast.css
diff --git a/ui/accessibility/extensions/highcontrast/highcontrast.css b/ui/accessibility/extensions/highcontrast/highcontrast.css
deleted file mode 100644
index c40306330675a23283a774c61dc76d394463cbde..0000000000000000000000000000000000000000
--- a/ui/accessibility/extensions/highcontrast/highcontrast.css
+++ /dev/null
@@ -1,81 +0,0 @@
-/* Copyright (c) 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. */
-
-html[hc="a0"] {
-  -webkit-filter: url('#hc_extension_off');
-}
-html[hcx="0"] img[src*="jpg"],
-html[hcx="0"] img[src*="jpeg"],
-html[hcx="0"] svg image,
-html[hcx="0"] img.rg_i,
-html[hcx="0"] embed,
-html[hcx="0"] object,
-html[hcx="0"] video {
-  -webkit-filter: url('#hc_extension_off');
-}
-
-html[hc="a1"] {
-  -webkit-filter: url('#hc_extension_highcontrast');
-}
-html[hcx="1"] img[src*="jpg"],
-html[hcx="1"] img[src*="jpeg"],
-html[hcx="1"] img.rg_i,
-html[hcx="1"] svg image,
-html[hcx="1"] embed,
-html[hcx="1"] object,
-html[hcx="1"] video {
-  -webkit-filter: url('#hc_extension_highcontrast_back');
-}
-
-html[hc="a2"] {
-  -webkit-filter: url('#hc_extension_grayscale');
-}
-html[hcx="2"] img[src*="jpg"],
-html[hcx="2"] img[src*="jpeg"],
-html[hcx="2"] img.rg_i,
-html[hcx="2"] svg image,
-html[hcx="2"] embed,
-html[hcx="2"] object,
-html[hcx="2"] video {
-  -webkit-filter: url('#hc_extension_grayscale_back');
-}
-
-html[hc="a3"] {
-  -webkit-filter: url('#hc_extension_invert');
-}
-html[hcx="3"] img[src*="jpg"],
-html[hcx="3"] img[src*="jpeg"],
-html[hcx="3"] img.rg_i,
-html[hcx="3"] svg image,
-html[hcx="3"] embed,
-html[hcx="3"] object,
-html[hcx="3"] video {
-  -webkit-filter: url('#hc_extension_invert_back');
-}
-
-html[hc="a4"] {
-  -webkit-filter: url('#hc_extension_invert_grayscale');
-}
-html[hcx="4"] img[src*="jpg"],
-html[hcx="4"] img[src*="jpeg"],
-html[hcx="4"] img.rg_i,
-html[hcx="4"] svg image,
-html[hcx="4"] embed,
-html[hcx="4"] object,
-html[hcx="4"] video {
-  -webkit-filter: url('#hc_extension_invert_back');
-}
-
-html[hc="a5"] {
-  -webkit-filter: url('#hc_extension_yellow_on_black');
-}
-html[hcx="5"] img[src*="jpg"],
-html[hcx="5"] img[src*="jpeg"],
-html[hcx="5"] img.rg_i,
-html[hcx="5"] svg image,
-html[hcx="5"] embed,
-html[hcx="5"] object,
-html[hcx="5"] video {
-  -webkit-filter: url('#hc_extension_yellow_on_black_back');
-}