The actual pixel output is appended. The expected output indicates the 'DIV2' element in the test case should not be visible.
 - http://trac.webkit.org/browser/trunk/LayoutTests/fast/regions/webkit-flow-renderer-layer.html
 - http://trac.webkit.org/browser/trunk/LayoutTests/fast/regions/webkit-flow-renderer-layer-expected.html
The fix for https://bugs.webkit.org/show_bug.cgi?id=97387 split the failing test into 2 parts. The part with elements collected in a flow thread that require accelerated compositing is placed in another test: compositing/regions/webkit-flow-renderer-layer-compositing.html.
*** This bug has been marked as a duplicate of bug 97387 ***