chromium/content/test/data/accessibility/html/iframe-coordinates-cross-process.html

<!--
@MAC-DENY:AXTitle
@MAC-DENY:AXValue
@MAC-ALLOW:LocalPosition
@MAC-ALLOW:AXSize

@WIN-DENY:title*
@WIN-ALLOW:location*
@WIN-ALLOW:size=(300, 150)
@WIN-ALLOW:size=(300, 100)
@WIN-ALLOW:size=(250, 50)
@WIN-ALLOW:size=(150, 50)
@WIN-ALLOW:IA2_STATE_EDITABLE

@AURALINUX-ALLOW:location*

@BLINK-ALLOW:location*
@BLINK-ALLOW:scrollX=*
@BLINK-ALLOW:scrollY=*
@BLINK-ALLOW:size=(300, 150)
@BLINK-ALLOW:size=(300, 100)
@BLINK-ALLOW:size=(250, 50)
@BLINK-ALLOW:size=(150, 50)
-->
<!DOCTYPE html>
<html>
<head>
<style>
body {
  overflow: hidden;
}
iframe {
  border: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
}
div {
  width: 300px;
  height: 150px;
}
</style>
</head>
<body style="margin: 0; padding: 0;">

<div>
  <button style="margin: 25px; border: 0; width: 250px; height: 50px">
    Button
  </button>
</div>

<div>
  <button style="margin: 25px; border: 0; width: 250px; height: 50px">
    Button
  </button>
</div>

<div>
  <iframe id="frame1" style="width: 300px; height: 100px;" scrolling="no"
          src="/cross-site/1.com/accessibility/html/frame/button.html">
  </iframe>
</div>

<div>
  <iframe id="frame2" style="width: 150px; height: 50px;" scrolling="no"
          src="/cross-site/2.com/accessibility/html/frame/button_scrolled.html">
  </iframe>
</div>

</body>
</html>