Layout of anonymous blocks should propagate depends_on_block_constraints #41629
Description
<!DOCTYPE html>
<style>
#flex-container {
display: flex;
flex-direction: column;
}
#flex-item {
width: 200px;
height: 200px;
background: red;
}
#target {
height: 100%;
background: green;
}
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="flex-container">
<div id="flex-item">
<div><!-- This wraps the inline-level canvas inside an anonymous block --></div>
<canvas id="target" width="100" height="100"></canvas>
</div>
</div>| Actual | Expected |
|---|---|
 |
 |
The anonymous block around the <canvas> doesn't establish a containing block. So it should propagate the depends_on_block_constraints up to the flex item.