Lazy backing has advanced enough to be used for backingstore tiles without drawbacks. Let's switch over to those.
Created attachment 203077 [details] Patch
Comment on attachment 203077 [details] Patch LGTM
Unofficial r+. Very happy about this.
Comment on attachment 203077 [details] Patch Looks great, but the patch doesn't seem to apply upstream.
Created attachment 203201 [details] Patch Thanks Carlos. Apparently the use of BlackBerry::Platform::StringBuilder in AboutData.cpp hasn't made it upstream, that's what caused the conflict. Luckily it's just as easy to delete the same line in the old code, so I'll retain the review and cq+ it right away.
Comment on attachment 203201 [details] Patch Clearing flags on attachment: 203201 Committed r150896: <http://trac.webkit.org/changeset/150896>
All reviewed patches have been landed. Closing bug.