This layout test fails. See master bug: https://bugs.webkit.org/show_bug.cgi?id=46506
This issue is not reproducable when we append " state().m_globalComposite ==CompositeDestinationAtop " in the CanvasRenderingContext2D::shouldDisplayTransparencyElsewhere()(so that to draw transparency in remaining canvas area before Image draw for destination-atop compositing).
or see bug 48297 there was a patch submitted to it .If it is get committed then this issue will not be reproducible ...
Can any one please resolve this bug as the issue is fixed along with the patch submitted in https://bugs.webkit.org/show_bug.cgi?id=48292 (http://trac.webkit.org/changeset/90723 )
Test is passing on all ports now.