Empty .d files can be generated sometimes when a build goes bad. We should clean up those files.
Created attachment 199878 [details] Patch
Have you checked to make sure that running this on a good build doesn't cause any extraneous rebuilding on a subsequent build?
(In reply to comment #2) > Have you checked to make sure that running this on a good build doesn't cause any extraneous rebuilding on a subsequent build? It does not appear to affect build times on a good build at all.
Committed r149228: <http://trac.webkit.org/changeset/149228>