Reimplement background blending to match the change in the CSS Blending and Compositing spec.
"Each background image must blend with the element's background images that are below it and the element's background color. Background image must not blend with the content that is behind the element."
Created attachment 201935 [details]
Comment on attachment 201935 [details]
Clearing flags on attachment: 201935
Committed r150503: <http://trac.webkit.org/changeset/150503>
All reviewed patches have been landed. Closing bug.