The patch committed in revision 34649 added the code needed to generate GTypes for enums but the makefile rules for stamp-webkitenumtypes.h and webkitenumtypes.cpp depend on Makefile instead of GNUmakefile.
Created attachment 22636 [details] Depend on GNUmakefile instead of Makefile
Good catch. Looks good.
Comment on attachment 22636 [details] Depend on GNUmakefile instead of Makefile Ok. I'll believe you.
landed in r35600