The corresponding methods in WebPageClient.h and ChromeClient.h, EmptyClients.h don't appear to have been upstreamed yet, so this should be all.
Now WebPageClient.h is upstream, so remove compositingWindow() from that one as well.
Fixing title.
Created attachment 128632 [details] Patch
Committed r108717: <http://trac.webkit.org/changeset/108717>