Fix history page middle click action

chrome/browser/resources/ntp4/synthetic_middleclick.js

Index: chrome/browser/resources/ntp4/synthetic_middleclick.js
diff --git a/chrome/browser/resources/ntp4/synthetic_middleclick.js b/chrome/browser/resources/ntp4/synthetic_middleclick.js
deleted file mode 100644
index 8c90c98a7f5abab97c059ede25c5e2a1345170b4..0000000000000000000000000000000000000000
--- a/chrome/browser/resources/ntp4/synthetic_middleclick.js
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright 2016 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.
-
-(function() {
-
-var middleButtonMouseDownTarget = null;
-
-document.addEventListener('mousedown', function(e) {
-  if (e.button == 1)
-    middleButtonMouseDownTarget = e.path[0];
-}, true);
-
-document.addEventListener('mouseup', function(e) {
-  if (e.button != 1)
-    return;
-
-  if (e.path.length > 0 && e.path[0] == middleButtonMouseDownTarget)
-    middleButtonMouseDownTarget.dispatchEvent(new MouseEvent('click', e));
-
-  middleButtonMouseDownTarget = null;
-}, true);
-
-})();