This test exercises direct compositing of images with hardware acceleration. The visual results using ACCELERATED_COMPOSITING and regular TOT should be identical. Running this test manually with the correct debug options will show which elements are directly composited. See https://bugs.webkit.org/show_bug.cgi?id=23361
 Basic image - no style - can be directly composited
    Basic image - no style - can be directly composited
   5px blue border - can NOT be directly composited
    5px blue border - can NOT be directly composited
   margin - can NOT be directly composited
    margin - can NOT be directly composited
   solid background - can be directly composited
    solid background - can be directly composited
   background image - can NOT be directly composited
    background image - can NOT be directly composited
   rotated but otherwise no style - can be directly composited
    rotated but otherwise no style - can be directly composited