Seems the trend is to go to solid color instead of a more distinguishable checkerboard pattern. It was decided that we should follow suit. In order to do this, here's a new member variable for BackingStore because when blitting, we can't access the page background color in a threadsafe way. Solid background color fill is still only used for public builds. Developers and beta testers should still see checkerboard and do something about it. Also tracked as RIM PR 188235. Patch below.
Created attachment 173132 [details] Patch
Comment on attachment 173132 [details] Patch Clearing flags on attachment: 173132 Committed r133979: <http://trac.webkit.org/changeset/133979>
All reviewed patches have been landed. Closing bug.