chromium/extensions/renderer/resources/platform_app.css

/*
 * Copyright 2014 The Chromium Authors
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 *
 * A style sheet for Chrome apps.
 */

@namespace "http://www.w3.org/1999/xhtml";

body {
  -webkit-user-select: none;
  cursor: default;
  font-family: $FONTFAMILY;
  font-size: $FONTSIZE;
}

webview, appview {
  display: inline-block;
  width: 300px;
  height: 300px;
}

html, body {
  overflow: hidden;
}

img, a {
  -webkit-user-drag: none;
}

[contenteditable], input {
  -webkit-user-select: auto;
}