<!DOCTYPE html>
<script>
if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.dumpChildFramesAsText();
    testRunner.waitUntilDone();
}
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<iframe id="frame1" name="frame1"></iframe>
<iframe id="frame2" name="frame2"></iframe>
<script>

var iframe1 = document.querySelector("#frame1").contentWindow;
var iframe2 = document.querySelector("#frame2").contentWindow;

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if(iframe1.internals)
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if(window.internals)
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console.log("Finished queueing tests.");
requestAnimationFrame(function() {
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});
</script>