chrome/browser/resources/identity_scope_approval_dialog/scope_approval_dialog.css

/* Copyright (c) 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. */

body {
  margin: 0;
  padding: 0;
}

.titlebar {
  -webkit-app-region: drag;
  background-color: white;
  height: 26px;
  white-space: nowrap;
  width: 100%;
}

.titlebar-border {
  border-bottom: 1px solid #e5e5e5;
}

.titlebar-close-button {
  background-image: -webkit-image-set(
    url('chrome://theme/IDR_CLOSE_DIALOG') 1x,
    url('chrome://theme/IDR_CLOSE_DIALOG@2x') 2x);
  -webkit-app-region: no-drag;
  height: 14px;
  margin: 6px;
  position: absolute;
  right: 0;
  width: 14px;
}

.titlebar-close-button:active {
  background-image: -webkit-image-set(
    url('chrome://theme/IDR_CLOSE_DIALOG_P') 1x,
    url('chrome://theme/IDR_CLOSE_DIALOG_P@2x') 2x);
}

.titlebar-close-button:hover {
  background-image: -webkit-image-set(
    url('chrome://theme/IDR_CLOSE_DIALOG_H') 1x,
    url('chrome://theme/IDR_CLOSE_DIALOG_H@2x') 2x);
}

.content {
  height: auto;
  width: 100%;
}