<!DOCTYPE html>
<canvas></canvas>
<script>
if (window.testRunner)
testRunner.waitUntilDone();
var canvas = document.querySelector("canvas");
var context = canvas.getContext("2d");
// first frame
requestAnimationFrame(function() {
// second frame which doesn't have a dirty
context.scale(2, 1);
requestAnimationFrame(function() {
// third frame which has a dirty
context.scale(2, 1);
context.fillRect(0, 0, 10, 10);
if (window.testRunner)
testRunner.notifyDone();
});
});
</script>