TiledBackingStore::supportsAlpha() is never called from other classes. So, this public method should be removed.
Created attachment 183064 [details] Patch
Comment on attachment 183064 [details] Patch ok
Comment on attachment 183064 [details] Patch Clearing flags on attachment: 183064 Committed r139991: <http://trac.webkit.org/changeset/139991>
All reviewed patches have been landed. Closing bug.