chrome/browser/resources/memory_internals/extension_view.css

/* 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. */

#extension-view .extension-id {
  text-align: right;
  width: 4em;
}

#extension-view .extension-info {
  text-align: left;
}

#extension-view .extension-memory {
  border-left: 1px solid rgb(181, 198, 222);
  text-align: right;
  width: 7em;
}

#extension-template {
  display: none;
}