Apply content-security-policy to chrome://net-internals.

chrome/browser/resources/net_internals/help.js

+// 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.
+
+document.addEventListener("DOMContentLoaded", function () {

[Evan Stade, 2011/07/20 01:36:16]

always use single quotes in js

[Tom Sepez, 2011/07/25 16:59:13]

Done.

[Tom Sepez, 2011/07/25 16:59:13]

Done.

+    document.getElementById("popup-close-button").addEventListener(
+        "click", window.close.bind(window));
+});