5 if (!window
.testRunner
|| !window
.internals
)
8 testRunner
.dumpAsText();
9 document
.body
.offsetTop
;
10 internals
.startTrackingRepaints(document
);
12 document
.getElementById('left').style
.top
= '400px';
13 document
.getElementById('right').style
.top
= '400px';
15 document
.body
.offsetTop
;
16 var layerTree
= internals
.layerTreeAsText(document
, internals
.LAYER_TREE_INCLUDES_REPAINT_RECTS
);
17 window
.internals
.stopTrackingRepaints(document
);
18 document
.getElementById('result').textContent
= layerTree
.indexOf('repaint') == -1 ? 'SUCCESS' : 'FAIL';
28 -webkit-backface-visibility: hidden;
38 There should be no repaint when the divs are moved vertically.
39 <div id=
"left">Left
</div>
40 <div id=
"right">Right
</div>
41 <pre id=
"result"></pre>