Subpixel rendering: Zero sized compositing container's content positioned off by one device pixel.

[zalan]

The content gets pushed to the left/bottom when the parent compositing layer has zero size.
<style>
.container {
    position: absolute;
    left: 0.25px;
    top: 0px;
    -webkit-transform: translateZ(0); 
}

.foo {
    position: absolute;
    left: 0.25px;
    top: 0px;
    width: 100px;
    height: 100px;
    border: 0.5px solid red;
}
</style>
<div class=container>
    <div class=foo></div>
</div>

[zalan]

<rdar://problem/17618608>

[zalan]

Created attachment 234883 [details]
Patch

[WebKit Commit Bot]

Comment on attachment 234883 [details]
Patch

Clearing flags on attachment: 234883

Committed r171100: <http://trac.webkit.org/changeset/171100>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.